Norco Range 2018 Geometry: Compare Medium Frames Across Wheel Sizes
Norco Range 2018 geometry needs both a frame-size label and a wheel-size column. Two medium C3 frames in the archive do not describe the same position. Comparing reach, stack and the original cockpit together gives a more useful starting point than deciding that every medium must fit similarly.
Read the Norco Range 2018 geometry columns together
The 2018 C3 archive (https://www.norco.com/bike-archives/2018/range-c3/) lists medium twice: once for 29-inch wheels and once for 27.5-inch wheels. Medium 29 has 437 mm reach and 614 mm stack. Medium 27.5 has 430 mm reach and 603 mm stack. Subtracting those published values gives a 7 mm reach difference and an 11 mm stack difference. Those are arithmetic comparisons of the frames, not predictions of comfort.
The archive also gives different original stem lengths: 40 mm for the 29-inch version and 50 mm for 650B. Do not add stem length directly to reach and call the result a complete riding-position measurement. The figures describe different parts of the bicycle, while the current bar, spacers, saddle position and component changes also affect the actual contact points.
Use more than one measurement for a viewing
Both medium entries have a 435 mm seat tube, but the listed horizontal top tubes differ: 607 mm for medium 29 and 597 mm for medium 27.5. Their wheelbases are 1187 mm and 1184 mm respectively. This combination shows why finding one matching dimension does not make the whole fit or chassis geometry identical.
Standover is another distinct row, with 798 mm for medium 29 and 784 mm for medium 27.5. Treat these as archived bicycle dimensions rather than a rider-height recommendation. The page does not turn that comparison into a guarantee of clearance for a particular rider, footwear or changed tyre setup. Examine the actual bicycle before making a purchase decision.
Take a written copy of the correct column to a viewing and record what has changed on the candidate bike. Confirm the wheel platform before comparing its seat-tube label. Then note the fitted stem, bar and seatpost instead of assuming the original C3 cockpit remains. A useful comparison with your current bike should use consistent measurements and include how the contact points are arranged.
FAQ
Do both medium entries have the same seat-tube length?
Yes. Both list 435 mm, despite differences in reach, stack and other dimensions.
How much taller is the listed medium 29 stack?
It is 11 mm higher by subtraction: 614 mm rather than 603 mm.
Does the longer original stem mean the 27.5 frame has more reach?
No. Its frame reach is 430 mm, compared with 437 mm for medium 29; stem length is a separate entry.
The C7 and C9 identification guide helps resolve an uncertain platform before a viewing. If the saddle adjustment is the remaining concern, compare the post and collar dimensions rather than inferring dropper fit from frame reach. More historical context is collected under Norco bicycles.
Photograph credits and permissions
Photograph 1
Original title: Norco Range.jpg
Creator: Walleater
Original source URI: https://commons.wikimedia.org/wiki/File:Norco_Range.jpg
License / permission: CC BY-SA 4.0
License / permission URI: https://creativecommons.org/licenses/by-sa/4.0/
Modification notice: Original JPEG bytes unchanged.