Rocky Mountain 2018 Altitude C50 Parts: Build a Useful Dealer Enquiry
A 2018 Altitude C50 parts enquiry becomes useful when it separates frame identity, the archived build and the parts currently fitted. Rocky Mountain's old component list supplies several precise labels, but it is not a complete replacement catalogue. Begin with the recall status (https://www.cpsc.gov/Recalls/2018/Rocky-Mountain-Bicycles-Recall-Mountain-Bicycles-Due-to-Crash-Hazard): a covered bicycle must remain out of use until an authorized dealer verifies its required inspection and repair.
Record the 2018 Altitude C50 parts by interface
Choose Carbon 50 in the 2018 archive (https://resources.bikes.com/en/bikes/altitude/2018), rather than borrowing the components under another Altitude build. The C50 bottom-bracket entry is Race Face BB92; the crank entry is Race Face Aeffect Cinch with a 32-tooth steel chainring. Send both descriptions together. The shell or bearing-family label alone is less informative than the actual crank and bottom-bracket identification.
The seatpost entry names Fox Transfer Performance Elite with a 30.9 mm diameter. Preserve the diameter and the product identity as distinct details. This archive does not give an insertion-depth chart or the travel of every post fitted to every frame size, so it cannot by itself settle the length of a proposed replacement dropper.
Distinguish a component name from a complete fit approval
For wheel enquiries, record the Rocky Mountain sealed Boost 15 mm front hub and DT Swiss 370 Boost 148 mm rear hub as the original entries. Tell the supplier which hub is actually installed now and provide its identifying details. A used bicycle may retain the frame while carrying a different wheel or hub, and the historic list does not describe every later replacement.
The headset is listed as FSA Orbit NO.57E. Use that exact name to start the enquiry, but do not invent bearing angles or individual bearing dimensions from the model name. A shop assessing the actual assembly can establish which pieces need replacement and whether previous changes affect the request.
Suspension needs similar care. The archived fork is a Fox 36 Float EVOL Grip Performance with 160 mm front travel; the shock is a Fox Float DPS EVOL Performance, with 150 mm rear-wheel travel listed separately. Rear-wheel travel is not an eye-to-eye dimension or shock stroke. Neither missing dimension should be guessed from the number 150 when searching a parts catalogue.
Send a compact record containing the full claimed model and year, frame size, component markings, relevant photographs and any known substitutions. Mark an unavailable dimension as unknown and ask the dealer what measurement or inspection is needed. That produces a more actionable request than declaring that any product carrying BB92, Boost or DPS in its name must fit.
FAQ: Replacement-enquiry questions
What seatpost diameter does the original list give?
It lists a 30.9 mm Fox Transfer Performance Elite; it does not provide every insertion or replacement-length requirement.
Does 150 mm rear travel identify the shock's length?
No. It describes rear-wheel travel; the archived shock entry does not supply the eye-to-eye length and stroke needed for a full replacement enquiry.
Is the listed rear hub shared with the Alloy 50 build?
No. Carbon 50 lists DT Swiss 370 Boost 148 mm, while the Alloy 50 entry names Shimano SLX Boost.
The frame-construction comparison resolves a different identity question. Keep this parts record with the Rocky Mountain historical information when seeking confirmation.
Photograph credits and permissions
Photograph 1
Original title: Rocky Mountain Altitude C50 2018.jpg
Creator: ThienToons; creator URI: https://commons.wikimedia.org/wiki/user:ThienToons
Original source URI: https://commons.wikimedia.org/wiki/File:Rocky_Mountain_Altitude_C50_2018.jpg
License / permission: CC BY-SA 4.0
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