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2012 Jamis Commuter 4 Step-Over

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Overview

Brand
Jamis
Model family
Commuter
Model year
2012
Category
Hybrid · commuter
Frame material
aluminum
Sizes
14 W, 18 W
Wheel size
700c

Drivetrain

Groupset
NuVinci N360
Chainrings
1
Electronic
false

Build

Fork
Jamis City/Cross radiused aluminum blades, forged dropouts with single eyelet
Stem
NVO Components TM-4 adjustable threadless system (ATS) forged aluminum stem, 10º x 90mm (14/15/16/17/18"), 105mm (19/21"), 115mm (23"). ATS shim length 100mm
Tires
Vittoria Adventure Touring with Rubber Shielding puncture protection and reflective sidewall, 700 x 32c
Brakes
Tektro linear pull brakes with Tektro CL530 ergonomic designed alloy brake levers with kraton insert
Saddle
Jamis Metro Sport with memory foam, synthetic leather cover, burnished sides and bumper springs with satin steel rails, gender specific
Wheels
Alex ID-19 double wall alloy rims with GSW sidewall, 36H, NuVinci N360 continuously variable planetary (CVP) transmission rear hub, Formula alloy front hub with QR and 14g stainless steel spokes
Cassette
18T
Crankset
Forged alloy crank, single 42T chainring, 170mm (14-18"), 175mm (19-23"), with full length chainguard
Seatpost
Jamis alloy micro-adjust, 27.2 x 350mm with alloy clamp and QR seatpin
Shifters
NuVinci N360 Shifter
Handlebar
Jamis ARC, 6061 aluminum, 25.4 x 27º sweep x 580mm
Weight kg
14.29

Geometry

14 W
Chainstay mm: 445; Wheelbase mm: 1041; Head angle deg: 71; Seat angle deg: 74
18 W
Chainstay mm: 445; Wheelbase mm: 1047; Head angle deg: 71; Seat angle deg: 73.5

NuVinci continuously variable rear hub, so there is no discrete gear count. Sizes in inches (W = women's or step-through sizes). Colors: Monterey Grey. Also listed: headset VP Slimstak threadless, 1 1/8"; bottom bracket FSA sealed cartridge, 68 x 122.5mm; pedals City style, full alloy, with TPE non-slip insert; chain KMC X8; grips Anatomic double density kraton grip with end plug. Frame: 6061 triple gauge aluminum main tubes and stays, sloping design, rear carrier and fender mounts, forged dropouts with double eyelets. Jamis served one combined spec sheet for this bike and the Commuter 4; this entry keeps only its own sizes and colors.

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