Orbea Occam rear axle: distinguish hub spacing, axle length and pivot parts

An Orbea Occam rear axle enquiry can go wrong when one dimension is asked to describe the whole assembly. Boost hub spacing, the axle's overall measurement and its thread pitch are different specifications. The historical Occam Bluepaper also lists separate pivot and hanger parts near the wheel axle, so a diagram number should travel with any order.

Read three Orbea Occam rear axle specifications separately

The Carbon and Hydro specification table gives a Boost 148×12 rear-axle standard, an axle measurement of 12×187 and a 1.5mm thread pitch. The 148 figure therefore must not be substituted for the listed 187mm axle length. Include all three entries when asking a supplier to identify the correct part.

These figures belong to the frame generation documented by the manual. They are not a specification for every bicycle ever called Occam. If the frame identity is uncertain, establish that first through Orbea or a dealer. Do not use the colour of a used bicycle as a replacement for its records.

Name the part that needs attention

Printed page 9 lists rear axle X205, derailleur hanger X160, axle-pivot kit X203 and rear-axle bearing kit X204 as separate references. The X203 heading expressly says that the hanger is not included. A request for “the rear axle kit” could therefore mean several different things to the person receiving it.

Explain whether the problem concerns a damaged wheel axle, the hanger, an insert or play at the rear assembly. Send an annotated photograph showing the relevant diagram position. Ask the workshop to diagnose movement before deciding which nearby part to replace; a wobble is an observation, not a part number.

Confirm the delivered item against the intended job

Retain the supplier's confirmed reference and description. Before installation, have the replacement's length, diameter and thread checked against the identified frame and the applicable instructions. A part that begins to engage is not proof that its complete dimensions and seating arrangement are correct.

Keep removed hardware together for the workshop to inspect and record which pieces were changed. Avoid improvising a washer stack or substituting a similar-looking bolt to make an uncertain axle reach. Correct identification should happen before tightening, especially when several parts in the drawing occupy the same area.

Axle and pivot FAQ

Does Boost148 tell me the complete axle length?

No. The manual lists hub spacing and the 12×187 axle measurement as different entries.

Does X203 include the derailleur hanger?

The documented axle-pivot kit specifically excludes the hanger; X160 is separately listed.

Should rear-end play automatically lead to a new wheel axle?

No. Ask for diagnosis of the actual moving interface before selecting a replacement.

A complete Orbea Occam rear axle enquiry identifies the frame, all relevant dimensions and the exact component being replaced. Explore the Orbea reference collection for related ownership questions, including the associated technical guide.

Primary reference: Orbea Occam Carbon and Hydro Bluepaper, printed pp6 and 9.