Drivetrain and brakes
Splined hub, six-bolt rotor: what you need and how it goes on
Splines where the rotor mounts mean a Center Lock hub, and a six-bolt rotor won't bolt to it. This page shows how to confirm your hub's mount, which rotors and adapters their makers list, and the published steps and torque figures for fitting them.
The short answer
Splines where the rotor goes mean a Center Lock hub. It takes a rotor with a splined center, held by a threaded lockring, so a six-bolt rotor has nothing to bolt to. You have two ways forward:
- Buy a Center Lock rotor the same diameter as your current one, in a thickness your brake's manual approves, listed for your brake pads, with a lockring that suits your hub.
- Keep the six-bolt rotor and add a Center Lock adapter whose maker names your rotor, or gives limits your rotor meets, and lists your axle.
Park Tool's rotor guide says a six-bolt rotor can go on a Center Lock hub with an adapter kit made for it, and that the reverse is not possible. So the hub sets the mount, and the rotor side is what you change: a different rotor, or an adapter under the one you have.
Fit it the way the makers specify:
- Rotor arrow pointing the way the wheel turns forward.
- Lockring to 40 N·m. Shimano, Magura, TRP, HED and DT Swiss (for its adapter) give that figure; Zipp gives 40 N·m as its maximum.
- Bolts prepared the way the rotor maker says. Magura and Zipp call for new bolts with fresh threadlocker; Shimano lists its six-bolt rotors with an anti-loosening plate, so follow that rotor's own instructions.
- Bolts tightened crosswise to the rotor maker's figure. Into an adapter, don't go over the adapter maker's figure (TRP gives 4–6 N·m). Into a six-bolt hub, stay within the hub maker's maximum.
Which mount does your hub have?
- Six-bolt (Zipp's term is ISO 6-bolt): six threaded holes in a circle on the hub. Magura says the rotor's holes must sit exactly over them.
- Center Lock: a splined collar with a thread for the lockring. Zipp's manual slides the rotor onto the hub splines, then threads the lockring into the hub. Park Tool notes that lockrings have notches either outside or inside.
- Eight-bolt: Magura's MDR-S 8H 203 needs special flat-head bolts, tightened to the hub maker's specification.
The spec sheet settles it. Shimano's 2026-2027 Spec. Handbook gives its disc hubs a "Brake type" row. In the Front Hub (Disc Brake) table on printed page 200 (page 203 of the PDF), the HB-QB400 is "6-bolt disc brake", while the HB-QC400 beside it is "CENTER LOCK disc brake". Zipp's Wheel and Hub Specifications list its ZM2 hubs as 6 Bolt and its ZM2 SL hubs as Center Lock, and its wheel tables carry a "Brake Compatibility" row. Similar names can hide different mounts, so look up your exact model.
Option 1: a Center Lock rotor
Four things have to match: the diameter your caliper is set up for, a thickness your brake's manual approves, your brake pads, and a lockring that fits your hub. Magura's rotor instructions put the thickness rule plainly: use only a thickness approved for your brake in its user manual. For Shimano rotors, the Rotor (CENTER LOCK) table on printed page 244 of the handbook (page 247 of the PDF) lists diameters, thickness and pad compatibility:
- Thickness: every Shimano Center Lock rotor there is the standard 1.75 mm except the RT-CL750, which is 2.2 mm. Shimano's chart C-461 lists the 2.2 mm rotors for four calipers: BR-M9220, BR-M8220, BR-M6220 and BR-MT620.
- Pad material: RT-CL300, SM-RT54, SM-RT30 and SM-RT10 are listed for resin pads only. The notes to chart C-461 say these rotors will be easily damaged if used with metal pads.
- Pad lining shape: RT-CL900, RT-CL800, RT-CL700, RT-CL750, SM-RT900, SM-RT800 and SM-RT64 are listed for narrow linings only; RT-CL300, SM-RT54, SM-RT30 and SM-RT10 for narrow or wide.
With a Shimano brake, chart C-461 in Shimano's compatibility PDF (printed pages 59 to 62, pages 54 to 57 of the file) is where to look: it lists the rotors each caliper takes, by diameter, with footnotes on size limits.
Which lockring fits is set by the hub. Shimano's chart C-612 (printed page 63 of the compatibility PDF, page 58 of the file) gives the rule for its hubs:
- Front hubs, internal-spline lockring: quick-release and 12 mm E-THRU hubs, not 15 mm E-THRU or 20 mm thru-axle hubs.
- Front hubs, external-spline lockring: all four types.
- Front hubs, internal-and-external type: all four, but on an E-THRU hub tighten it with TL-FC36, because TL-LR11 cannot install it.
- Rear hubs go by model, not axle. FH-M9111, FH-M9111-B, FH-M9111-BS, FH-M9000, FH-M9010, FH-M9010-B, FH-MT901-B and FH-MT901-BS take only the external-spline lockring. Shimano's other rear disc hubs take all three types.
For front hubs, TRP's guide draws the line in the same place: a lockring with 12 internal notches for 12 mm axles, one with 16 external notches for 15 and 20 mm axles. On a rear wheel, find your hub model in chart C-612 before choosing a lockring. Shimano's dealer's manual DM-MADBR01 names TL-LR15 with an adjustable wrench for the internal type and TL-FC36 for the external type. Park Tool matches a BBT-9, BBT-69.4 or similar to outside notches and its FR-5.2 family to inside-only notches. TRP calls for a cassette installation tool on the internal type, the kind that fits a cassette lockring. Unsure of your axle size? See replacing a thru axle.
Option 2: an adapter for the six-bolt rotor
Park Tool describes two designs. On a Shimano-style adapter the rotor bolts to the adapter, then a lockring goes on; on a DT Swiss-style adapter the rotor sits on six fittings and the lockring clamps it. Only some makers say which rotors their adapter takes. Shimano and Magura name models, and DT Swiss gives thickness and diameter limits. The others describe their fit in general terms, so if your rotor isn't named, check your rotor maker's instructions before relying on one of them.
| Adapter | Rotors its maker names | Axles and other limits |
|---|---|---|
| Shimano SM-RTAD05 | SM-RT66, SM-RT56 and SM-RT26. Not the SM-RT86, the six-bolt rotor installed with an aluminum adapter. | Front: 9 mm quick release, 15 mm E-THRU, 20 mm thru. Rear: 10 mm quick release, 10 mm thru, 12 mm thru, 12 mm E-THRU. Hexalobular rotor bolts; steel external-serration lockring. |
| Magura Centerlock adapter | Magura STORM, STORM HC, STORM SL 2, MDR C and MDR S. Never MDR P. | Rotors up to 203 mm. Never with ABS sensor rings. Use the Magura lockring for your axle type (quick release or thru axle). |
| DT Swiss CL-Adapter (MTB; ROAD for QR/TA9/TA12; Hybrid with magnet) | No model list. Rotors 1.8 to 2.2 mm thick. | Up to the diameter marked on its lockring. Complete assembly only. Lockring 40 N·m. |
| TRP Centerlock to 6-Bolt Adapter (ABOT001215) | No list. TRP says it suits most six-bolt rotors and to confirm fit with your hub and rotor makers. | 12 mm or 15–20 mm versions. Rotors up to 223 mm. Rotor bolts 4–6 N·m; lockring 40 N·m. |
| HED 6-Bolt to Centerlock Adapter with Lockring | No list. HED says any six-bolt rotor. | 12, 15 and 20 mm thru axles and quick release. Lockring included; 40 N·m. |
| HUNT 6-Bolt Rotor Adapter | No list. HUNT says the majority of six-bolt rotors. | For the Center Lock spline on HUNT disc hubs. Rotors up to 180 mm. Lockring included. |
| Ritchey hub adapter center-lock to 6 bolt w/lockring | Not stated. | Quick release/12 mm and 15/20 mm thru-axle versions. Lockring included. |
Magura MT A2 brakes: Magura's MT A2 instructions say never to use the six-bolt MDR-A rotor with a Center Lock adapter, whether Magura's own or another maker's. The same instructions say to use only genuine Magura rotors designed for the MT A2, and name the MDR-A and MDR-A CL.
Other exclusions are easy to miss:
- Shimano says the SM-RTAD05 cannot be used with the SM-RT86.
- With a Magura brake, Magura's rotor instructions say to use only Magura original parts, adapters and bolts included.
- Shimano lists the SM-RT66, SM-RT56 and SM-RT26 at 1.75 mm thick, below the 1.8 mm minimum DT Swiss gives for its adapter.
- On one of the Shimano rear hubs that take only the external-spline lockring, check the adapter's lockring type. Shimano lists the SM-RTAD05 with an external-serration lockring. TRP pairs 12 mm axles with its internal-notch lockring, so on those hubs confirm fit with TRP before choosing its 12 mm version.
How it goes on
| Document | Lockring | Rotor bolts |
|---|---|---|
| Shimano dealer's manual DM-MADBR01 (hydraulic disc brake) | 40 N·m | Not covered; the section is for Center Lock rotors |
| Magura disc brake rotor assembly instructions | 40 N·m (354 lbf-in) | 6 N·m (53 lbf-in); MDR-S 8H 203: hub maker's figure |
| DT Swiss hubs user manual V2026.05 | 40 N·m (its Center Lock adapter) | 6 N·m |
| Zipp road wheels user manual | 40 N·m (354 in-lb) maximum | Rotor maker's figure, 6.2 N·m (55 in-lb) maximum |
| TRP six-bolt to CenterLock adapter guide | 40 N·m | 4–6 N·m, into the adapter |
- Clean the hub splines and lockring thread, as DT Swiss's steps begin; TRP wipes the hub's mounting surface with isopropyl alcohol. Keep grease off: Park Tool says not to grease or oil rotor bolts, and that grease isn't needed on Center Lock rotors and may contaminate the rotor surface.
- Assemble any adapter in the order its instructions give, and fit the rotor with its direction arrow pointing the way the wheel turns forward.
- Bolted rotor: prepare the bolts the way the rotor maker says. Magura calls for new bolts with fresh medium-strength threadlocker, and Zipp for new, threadlock-prepped bolts. Shimano lists its six-bolt rotors with an anti-loosening tightening plate, so follow that rotor's own instructions. Magura's sequence: two or three turns by hand, rotor turned against the direction of rotation as far as it goes, then tighten crosswise.
- Torque the bolts to the rotor maker's figure. Into an adapter, don't go over the adapter maker's figure: TRP gives 4–6 N·m, and Park Tool says to torque bolts into a Shimano-style adapter as you would on a six-bolt hub, where it puts typical torque at about 4–6 N·m. Into a six-bolt hub, never go above the hub maker's maximum (Magura's MT A2 instructions).
- Clamp-type adapter: use all its parts together, as DT Swiss requires for its adapter. On Magura's adapter, the six hooks of the spring washer must noticeably engage the adapter.
- Thread the lockring on by hand, then tighten to 40 N·m with the tool that fits its notches.
- Degrease the rotor with brake cleaner or alcohol (Magura); Park Tool and TRP use isopropyl alcohol. Magura says a new rotor gets new pads.
- Bed in with your brake maker's procedure. Magura's rotor instructions: repeated slowdowns from 20 km/h (12 mph) to 5 km/h (3 mph), one brake at a time, until braking stops improving.
If it rubbed or the bolts loosened
We can't see your wheel, so this is not a diagnosis. These are the checks the makers' documents point to:
- Combination: is the rotor one the adapter's maker names, within its diameter limit and, for DT Swiss, 1.8 to 2.2 mm thick? A six-bolt Magura MDR-A goes on no Center Lock adapter at all.
- Rotor and caliper: the notes to Shimano's chart C-461 say narrow-type two-piece rotors are not compatible with calipers made for wide-type rotors, because of interference.
- Bolts: prepared the way the rotor maker says (new and threadlocked, for Magura and Zipp), tightened crosswise to its figure, and within the adapter maker's figure when they go into an adapter?
- Lockring: right type for the hub (by axle at the front, by model on a Shimano rear hub), at 40 N·m? DT Swiss warns that its adapter lockring must not be used to mount a Center Lock rotor: it won't tighten it properly and leaves excessive play.
- Alignment: Zipp says to check the rotor is centered in the caliper and, if not, follow your brake maker's instructions. Magura's MT A2 instructions say to check the rotor runs between the pads without touching, aligning the caliper if necessary.
- Follow-up: DT Swiss lists rechecking the adapter (40 N·m) and rotor screws (6 N·m) every 20 operating hours.
What to check on your own bike
- Hub or wheel: the "Brake type" row (Shimano hubs) or "Brake Compatibility" row (Zipp wheels) in its spec sheet.
- Front or rear, axle type and size and, on a Shimano rear hub, the model number: these decide the lockring.
- Rotor model, diameter and thickness: these decide the adapter, or rule one out.
- Brake caliper and pad type: these decide which Center Lock rotors are listed for you. For Shimano brakes, that's chart C-461.
- Torque: the rotor's instructions for the target; the adapter maker's figure as the limit when the bolts go into an adapter, the hub maker's when they go into a six-bolt hub.
Check it on your own equipment
These take you to the manufacturers and standards bodies the page draws on, so you can look up your exact model.
- Manufacturer specification
Shimano 2026-2027 Spec. Handbook: Rotor (CENTER LOCK), Rotor (6-bolt) and Rotor Adapter tables (opens in a new tab)Center Lock rotor list with diameters, thickness, pad compatibility and lockring types (printed page 244, PDF page 247); six-bolt rotor list (printed 245, PDF 248); the SM-RTAD05's compatible rotors and axles (printed 249, PDF 252); hub tables showing each hub's 'Brake type'. — productinfo.shimano.com - Manufacturer specification
Shimano Products compatibility Information: charts C-461 (rotors by caliper) and C-612 (lockrings by hub) (opens in a new tab)Ver 2.6, Sep. 17, 2026. Chart C-461, printed pages 59 to 62 (PDF pages 54 to 57), lists the rotors each Shimano caliper takes by diameter, with notes on resin-only rotors and narrow versus wide types. Chart C-612, printed page 63 (PDF page 58), shows which lockring type fits each front hub by axle and each rear hub by model, with the TL-FC36 note. — productinfo.shimano.com - Manufacturer specification
Magura assembly instructions: disc brake rotor (opens in a new tab)Magura's steps for six-bolt and eight-bolt rotors, Center Lock rotors and its Centerlock adapter: arrow direction, the crosswise bolt sequence, 6 N·m and 40 N·m, which Magura rotors the adapter accepts and which it never does, the original-parts rule, degreasing and bedding in. — magura.com - Official support page
Shimano dealer's manual DM-MADBR01: Installing the disc brake rotor (opens in a new tab)Shimano's Center Lock rotor installation step: lockring torque 40 N·m, with TL-LR15 and an adjustable wrench for the internal spline type and TL-FC36 for the external spline type. — si.shimano.com
What this page does not tell you
- Torque figures here are each maker's own, for its own parts. If the maker of your rotor, adapter or hub gives a different figure for its part, that figure applies.
- Shimano's spec handbook, compatibility charts and dealer's manual give no bolt torque for the SM-RTAD05 or for Shimano's six-bolt rotors. Follow the instructions that come with the rotor or adapter.
- TRP, HED, HUNT and Ritchey don't publish a list of rotors for their adapters, so a particular rotor can't be confirmed to fit them. Check your rotor maker's instructions, or confirm fit with the adapter maker.
- Shimano page numbers refer to Ver. 2.7 of the spec handbook and Ver 2.6 of the compatibility file, both dated Sep. 17, 2026. Shimano's links point to the latest edition, so page numbers can shift; the section and chart names will still find the right table.
- This page doesn't cover caliper mounts, caliper adapters, or the largest rotor your frame and fork accept. Check your frame, fork and brake makers' specifications for those.
Sources
15 documents, each with the facts on this page it supports. Manufacturers revise specifications, so every source is dated — open it before you buy.
- Rotor and hub should share the same interface; six-bolt rotors fasten with six bolts, Center Lock rotors with a lockring that has external notches or internal splines.
- A six-bolt rotor can be installed on a Center Lock hub with an adapter kit made for that purpose.
- Park Tool says the reverse (a Center Lock rotor adapted to a six-bolt hub) is not possible.
- The hub sets the mount; the rotor side (a different rotor or an adapter) is what changes.
- Lockrings with notches on the outside take a BBT-9, BBT-69.4 or similar tool; inside-only notches take an FR-5.2-family tool.
- A rotor's arrow should match the wheel's direction of rotation.
- Do not grease or oil rotor bolts; grease is not needed on Center Lock rotors and may contaminate the rotor surface.
- Park Tool wipes the rotor surfaces with isopropyl alcohol.
- Two adapter designs: on a Shimano-style adapter the rotor bolts to the adapter and a lockring then goes on; on a DT Swiss-style adapter the rotor engages six fittings and the lockring is tightened.
- For a Shimano-style adapter, torque the bolts to the adapter in a star pattern as on a six-bolt hub; Park gives about 4–6 Nm as typical torque for six-bolt rotor bolts.
- A splined rotor seat with a thread for a lockring identifies a Center Lock hub.
- Zipp's Center Lock steps: rotor onto the hub splines, then the locking mechanism threaded into the hub.
- Zipp: tighten the center locking mechanism to no more than 40 N·m (354 in-lb).
- Zipp calls the bolted mount ISO 6-bolt; install with new, threadlock-prepped bolts, tighten alternately to the rotor maker's torque, not exceeding 6.2 N·m (55 in-lb).
- Zipp: check the rotor is centered in the caliper; if not, consult the brake maker's instructions.
- Use the rotor maker's figure as the bolt target; into an adapter, stay within the adapter maker's figure; into a six-bolt hub, within the hub maker's maximum.
- On a bolted mount, the rotor's holes must lie exactly over the hub's threaded holes.
- Mount the rotor so its direction arrow points in the wheel's forward direction of rotation.
- Magura's MDR-S 8H 203 eight-bolt rotor needs special flat-head bolts; its tightening torque is in the hub maker's specifications.
- Magura's bolted-rotor sequence: new medium-strength bolt-locking on all bolts, two to three turns by hand, rotor turned against the direction of rotation as far as it goes, then bolts tightened crosswise.
- Magura rotor bolt torque (rotors other than MDR-S 8H 203): 6 Nm (53 lbf-in).
- Magura gives 40 Nm (354 lbf-in) for its lockrings.
- Magura: degrease the rotor thoroughly with brake cleaner or alcohol.
- Magura: when a new rotor is mounted, always mount new brake pads as well.
- Magura: use only rotor thicknesses approved for the brake in its user manual.
- Magura's Centerlock adapters are for Magura STORM, STORM HC, STORM SL 2, MDR C and MDR S six-hole rotors up to 203 mm.
- Magura: never use its Centerlock adapters with MDR P rotors.
- Magura: never use its Centerlock adapters with ABS sensor rings.
- Magura: use a Magura lockring for the hub's axle type (quick release or thru axle).
- On Magura's adapter, the six hooks of the spring washer must noticeably engage the adapter; the adapter uses no rotor bolts.
- Magura bedding-in: accelerate to 20 km/h (12 mph), brake to 5 km/h (3 mph), repeat until no further improvement, each brake separately.
- Magura: use only MAGURA original parts on its brakes, including rotors, pads, adapters and bolts.
- Never use the six-bolt MDR-A rotor with a Center Lock adapter, whether Magura's own or another maker's.
- Use only genuine Magura pads and rotors designed for the MT A2; the instructions name the MDR-A and MDR-A CL rotors.
- Never exceed the maximum rotor-screw torque recommended by the hub manufacturer.
- Rotor mounting screws must always be brand new and coated with fresh medium-strength threadlock.
- Check that the rotor runs between the pads without touching; align the caliper if necessary.
- Shimano's handbook gives disc hubs a 'Brake type' row: HB-QB400 is '6-bolt disc brake' and HB-QC400 is 'CENTER LOCK disc brake' (Front Hub (Disc Brake), printed page 200, PDF page 203).
- The Front Hub (Disc Brake) table on printed page 56 (PDF page 59) also carries the 'Brake type' row, with CENTER LOCK entries.
- Near-identical model names can carry different rotor mounts, so the exact model must be checked.
- In Shimano's Rotor (CENTER LOCK) table (printed page 244, PDF page 247), every rotor is standard 1.75 mm except RT-CL750, which is thick 2.2 mm.
- RT-CL300, SM-RT54, SM-RT30 and SM-RT10 are listed for resin pads only; the other Center Lock rotors for metal or resin.
- RT-CL900, RT-CL800, RT-CL700, RT-CL750, SM-RT900, SM-RT800 and SM-RT64 are listed for narrow pad linings only; RT-CL300, SM-RT54, SM-RT30 and SM-RT10 for narrow or wide.
- The Rotor (CENTER LOCK) table lists diameters and lockring types for each rotor.
- Shimano lists each six-bolt rotor (RT-6B750, RT-MT905, SM-RT86, SM-RT66, SM-RT56, SM-RT26) 'With anti loosen tightening plate' (Rotor (6-bolt), printed page 245, PDF page 248).
- Shimano lists SM-RT66, SM-RT56 and SM-RT26 at the standard 1.75 mm thickness.
- SM-RTAD05 attaches a six-bolt rotor to a CENTER LOCK hub; compatible rotors SM-RT66, SM-RT56, SM-RT26; cannot be used with SM-RT86, the six-bolt rotor installed with an aluminum adapter (Rotor Adapter, printed page 249, PDF page 252).
- SM-RTAD05 uses hexalobular rotor bolts and a steel external-serration lockring.
- SM-RTAD05 axles: front 20 mm thru, 15 mm E-THRU, 9 mm quick release; rear 12 mm E-THRU, 12 mm thru, 10 mm thru, 10 mm quick release.
- The Shimano handbook pages cited give no rotor-bolt torque for SM-RTAD05 or Shimano six-bolt rotors.
- Printed pages 56, 200, 244, 245 and 249 of the handbook are PDF pages 59, 203, 247, 248 and 252; the handbook is Ver. 2.7, Sep. 17, 2026.
- The SM-RTAD05's external-serration lockring is the external kind Shimano's chart C-612 lists for every front and rear hub.
- On Shimano front disc hubs, an internal-spline lockring fits quick-release and 12 mm E-THRU hubs but not 15 mm E-THRU or 20 mm thru-axle hubs; external-spline and internal-and-external types fit all four.
- On E-THRU hubs, Shimano's internal-and-external spline lockring cannot be installed with TL-LR11; tighten it with TL-FC36.
- Shimano rear hubs FH-M9111, FH-M9111-B, FH-M9111-BS, FH-M9000, FH-M9010, FH-M9010-B, FH-MT901-B and FH-MT901-BS take only the external-spline lockring; other rear disc hubs take all three types.
- Chart C-612 is on printed page 63 (PDF page 58); chart C-461 spans printed pages 59 to 62 (PDF pages 54 to 57); the file is Ver 2.6, Sep. 17, 2026.
- Chart C-461 lists the 2.2 mm rotors (RT-CL750, RT-6B750) for BR-M9220, BR-M8220, BR-M6220 and BR-MT620 calipers.
- Chart C-461 lists the rotors each Shimano caliper takes, by diameter, with footnotes on size limits.
- Chart C-461 notes: SM-RT56, SM-RT54, SM-RT30, SM-RT26, SM-RT10, RT-EM300 and RT-CL300 suit resin-pad calipers only and will be easily damaged if used with metal pads.
- Chart C-461 notes that narrow-type two-piece rotors are not compatible with calipers for wide-type rotors, because of interference.
- Shimano's dealer's manual gives 40 N·m for the Center Lock rotor lockring, using TL-LR15 and an adjustable wrench for the internal spline type and TL-FC36 for the external spline type.
- That Shimano section covers Center Lock rotors and gives no six-bolt bolt figure.
- 40 N·m is the lockring figure given by Shimano, Magura, TRP, HED and DT Swiss (for its adapter); Zipp gives 40 N·m as its maximum.
- DT Swiss: the lockring of its Center Lock adapter must not be used to mount a Center Lock rotor; it will not tighten it properly and results in excessive play.
- DT Swiss Center Lock adapters may only be used as complete assemblies, all parts together.
- The DT Swiss Center Lock adapter may only be used with rotors 1.8 to 2.2 mm thick and up to the maximum diameter indicated on its lockring.
- DT Swiss adapter steps begin by cleaning the hub's Center Lock connection and lockring thread, and end with the lockring screwed on by hand then tightened to 40 Nm.
- DT Swiss lists checking tightening torques every 20 operating hours: Center Lock adapter 40 Nm, brake rotor screws 6 Nm.
- Shimano's 1.75 mm SM-RT66, SM-RT56 and SM-RT26 are below the 1.8 mm minimum DT Swiss gives for its adapter.
- DT Swiss lists the CL-Adapter MTB (HWZXXX00S1232S), CL-Adapter ROAD for QR/TA9/TA12 (HWZXXX00S4760S) and CL-Adapter Hybrid with magnet (HWZXXX00S7044S) for mounting a six-hole rotor on Center Lock hubs.
- Zipp lists its ZM2 hubs as 6 Bolt and its ZM2 SL hubs as Center Lock; its wheel tables carry a 'Brake Compatibility' row (for example Disc (6-bolt), Disc (Center Lock)).
- TRP Centerlock to 6-Bolt Adapter (SKU ABOT001215): 12 mm or 15-20 mm axle versions, rotors up to 223 mm.
- TRP describes the adapter as compatible with most Center Lock hubs and six-bolt rotors, without a rotor list, and says to consult hub and rotor makers to ensure fitment.
- TRP's guide: rotor bolts 4-6 Nm in an alternating pattern; lockring 40 Nm.
- TRP's guide: 12 mm axles use a lockring with 12 internal notches and a cassette installation tool; 15 and 20 mm axles use a larger lockring with 16 external notches and a bottom bracket tool.
- For front hubs, TRP's lockring split matches Shimano's chart (internal type not for 15 or 20 mm hubs).
- On the Shimano rear hubs C-612 lists as external-only, TRP's pairing of 12 mm axles with an internal-notch lockring is not confirmed by Shimano's chart, so fit should be confirmed with TRP.
- TRP: clean the hub mounting surface with isopropyl alcohol; rotor rotation arrow points in the direction of forward wheel rotation; clean braking surfaces with isopropyl alcohol.
- HED 6-Bolt to Centerlock Adapter: any six-bolt rotor to any hub with Center Lock splines, no rotor list; fits 12, 15 and 20 mm thru axles and quick release; lockring included; torque 40 Nm.
- HUNT 6-Bolt Rotor Adapter fits a six-bolt rotor to the Center Lock spline on HUNT disc hubs; made for the majority of six-bolt rotors, no list; max rotor 180 mm; includes a lockring.
- Ritchey hub adapter center-lock to 6 bolt w/lockring: quick release/12 mm and 15/20 mm thru-axle versions, lockring included; no rotor list or maximum size stated.