Kona Sutra brake and axle specification: identify the 2021 interfaces

The Kona Sutra brake and axle specification is useful only when attached to the correct generation. The official 2021 archive identifies hub dimensions, brake calipers, rotor sizes and controls in separate rows. Reading those entries separately helps you prepare a precise parts enquiry instead of assuming that any component described as Sutra or disc will fit.

Read the Kona Sutra brake and axle specification one interface at a time

The 2021 front-hub row is Formula 100x12 millimetres and the rear is Formula 142x12 millimetres. Keep front and rear values separate. They describe the listed hub dimensions; they do not supply every detail needed to buy a frame axle, such as its complete length, thread specification or the shape of its seating surfaces.

For the brakes, the detailed caliper row says TRP Spyre C Flat Mount. Both rotor rows specify TRP 160 millimetres. Caliper mounting and rotor diameter are different facts. Neither should be expanded into an unstated maximum rotor size or an assurance that a different frame accepts the same assembly.

Distinguish calipers, brake levers and shifters

The brake levers are listed as Tektro RRL-A and the shifters as MicroShift. The archive's highlight uses the wording Tektro Spyre C, while the detailed caliper field uses TRP Spyre C. When recording the build, preserve the specific field and its wording rather than resolving that difference by inventing a new component designation.

This matters when someone reports that a control has been replaced. A shifter name does not identify the brake lever, and a lever name does not establish which caliper is fitted. Request readable markings and a view of the actual arrangement. The table documents original equipment; it does not demonstrate cable condition or present braking performance.

Do not transfer a later interface to an earlier bicycle

The selected 2016 Sutra table instead names Hayes CX Expert calipers, Hayes L Series rotors and Shimano Deore hubs without the same dimensional wording. Its frame and fork entries also differ in their descriptions. The continuing model name cannot supply the missing compatibility evidence for a proposed cross-year wheel or brake replacement.

For example, the later fork is explicitly named Kona Project Two Cromoly Disc Touring, while the earlier detailed fork field reads Project Two Disc. Record those source descriptions accurately. Similar Project Two wording is not a substitute for identifying the actual fork or confirming its replacement requirements.

Use the Kona Sutra brake and axle specification to assemble a question for the manufacturer, supplier or workshop: identify the frame generation, the relevant hub, the installed caliper and the part you want to replace. The historical 2009-labelled photograph is model context only. It cannot verify the 2021 axle dimensions or flat-mount interface, so a close-up of the actual bicycle remains necessary.

FAQ

Does the rear hub's 142x12 entry specify the complete axle?

No. The table gives the hub dimensions, not a complete replacement frame-axle drawing or thread specification.

Are 160-millimetre rotors stated as the maximum?

No. They are the original rotor sizes in this build; a maximum is not established by these rows.

Which caliper designation does the detailed 2021 table give?

It lists TRP Spyre C Flat Mount, while the highlight says Tektro Spyre C. Preserve the field distinction and confirm the fitted caliper's markings.

An earlier used example needs the 2016 Sutra original-component checklist, rather than the later component list. More Kona material is available through the Kona topic.

Sources: Kona 2021 Sutra official archive; Kona 2016 Sutra official archive.