Norco Range 2018 Chainring Limits: Match the Frame Size and BB92 Shell
Norco Range 2018 chainring limits change with both wheel platform and frame size. A maximum quoted for the largest C7 frame is not a limit for every Range Carbon. Before buying a crank or larger ring, identify the exact column and separate the frame's clearance information from the components originally supplied.
Read the Norco Range 2018 chainring limits by size
The 2018 technical table (https://www.norco.com/downloads/bike-spec-sheets/range-carbon-small-parts.pdf) specifies one-by use only. Its C9 maxima are 32 teeth for M, 34 for L and 36 for XL. The C7 row is different: XS 32, S 36, M 38, L 40 and XL 42. Keep the size letters attached to the numbers when sending a compatibility enquiry; dropping that context changes the meaning of the table.
The archived C3 build (https://www.norco.com/bike-archives/2018/range-c3/) lists a 32-tooth ring for the 29-inch version and a 34-tooth ring for 650B. Those are build descriptions rather than a substitute for the size-dependent maximum row. In particular, do not treat the archive's broad variant description as evidence that a ring is suitable for every frame size without checking the more specific table and actual bicycle.
Identify the shell before choosing a crank system
The frame table gives PF92, a 41 mm internal diameter and 92 mm width, for both carbon platforms. This is shell information. A bottom bracket must also suit the chosen crank spindle and its required installation arrangement, so “BB92” alone does not name every part needed for a conversion. The archive says the original crank was supplied with a Pressfit BB92 bottom bracket.
Write the current crank and bottom-bracket identifiers beside the frame information. If either has changed, describe the installed combination rather than assuming the archive remains a parts inventory. A useful retailer enquiry can then distinguish replacing worn components in the existing system from proposing a different crank and bottom bracket.
The table also lists ISCG05 mounts and no front-derailleur provision. These entries should not be stretched into approval for an arbitrary chain guide or a multiple-chainring drivetrain. Ask how the actual ring, crank and guide work together, while retaining the stated frame limit. A theoretical tooth count does not establish that every ring shape or mounting arrangement clears.
Choose gearing only after those fit questions are resolved. The archive's cassette model wording is not needed to establish the frame's ring maximum, and it should not be used to force a compatibility conclusion. The decision here is whether the proposed ring and crank system have adequate evidence for this particular chassis.
FAQ
What maximum does the table give a medium C9?
It gives 32 teeth, while medium C7 is listed with a different 38-tooth maximum.
Is a 42-tooth maximum shared by all C7 sizes?
No. It appears for XL C7 only; the other sizes have their own lower entries.
Does the shell specification identify my crank spindle?
No. PF92 with 41 mm internal diameter and 92 mm width describes the frame interface, not the complete crank system.
Resolve chassis identity through the C7 and C9 comparison before discussing larger gearing. Keep the Norco historical model context and your actual installed parts record alongside the relevant size row.
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