Friday, December 10, 2010

Jamis Commuter 4 - 2011


Jamis Commuter 4 - winter blue - 2011
For 2011, the Jamis Commuter series has been updated. We previously reviewed the Jamis Commuter in 2008, when the Commuter 4 was equipped with a derailer set-up. Now the top-of-the-line Commuter 4 sports an 8-speed Shimano Nexus hub, a rear rack, and a headlight powered by a front hub dynamo, for only $750. Unfortunately, the flat fenders and thin chainguard are still there, more for style than for function, and the riding position is rather leaned-forward, in the Hybrid bike form. But for someone who lives in a dry climate and likes that riding posture, this is a good-looking bike that will get you home safely at night, and it's a good deal for a bike with an 8-speed internal gear hub and a hub dynamo.
Jamis Commuter 4 - step-thru, white

The women's version, common on hybrids, is not my style, but may be perfect for someone who wants the lower standover, but does not like the swoopy, loop frame look.

Jamis provides plenty of information about components and geometry:

Specifications:


Frame6061 triple gauge aluminum main tubes and stays, sloping design, rear carrier and fender mounts, forged dropouts with double eyelets
ForkJamis City/Cross radiused aluminum blades, forged dropouts with single eyelet
HeadsetVP Slimstak threadless, 1 1/8”
WheelsAlex ID-19 double-wall rims, 36H, with Shimano Nexus Inter-8 rear,
Shimano DH2N35 Dynamo front hub, 14g stainless steel spokes.
TiresVittoria Adventure Touring, 700 x 32c, with Rubber Shield puncture protection, reflective safety stripe
ShiftleversShimano Revo-Shift SL-8S20 for Nexus hub, 8-speed
ChainKMC Z410
CassetteShimano Nexus 20T
CranksetForged alloy crank, single 42T chainring, 170mm (14-18”), 175mm (19-23”), with full length chainguard
BB SetSealed cartridge, 68 x 122.5mm
PedalsCity style, full alloy, with TPE non-slip insert
BrakesetTektro linear pull brakes with Tektro Tenera Levers
HandlebarJamis ARC, 6061 aluminum, 580mm x 27º sweep
StemNVO Components adjustable threadless system (ATS) aluminum stem, TM-4, 90mm (14/15/16/17/18”), 105mm (19/21”), 115mm (23”)
GripsJamis anatomical, dual density, with stitched synthetic leather cover
Seat PostJamis alloy micro-adjust, 27.2 x 350mm, alloy clamp with QR seatpin
SaddleJamis Metro Sport, with memory foam, gender specific
AccesoriesDynamo-powered headlight, chainguard, 
SizesM: 15”, 17”, 19”, 21”, 23” F: 14”, 18”
ColorM: Winter Blue F: Pearl White
Weight30.75 lbs


The commuter 3 drops the dynamo, lights and rack; the rear hub is a Shimano Nexus 7.


Jamis Commuter 3 - sky blue - 2011

Frame Geometry

SIZE
SEAT
TUBE
TT* LENGTH
HT ANGLE
ST ANGLE
CHAIN
STAY
WHEEL
BASE
FORK RAKE
BB HEIGHT
HEAD
TUBE
STAND
OVER
1534054771˚74˚445104145285100700
1738856272˚73.5˚445105745285120735
1943657172˚73.5˚445105345285140771
2148758572˚73.5˚445106845285180815
2352859572˚73.5˚445107945285200844
*Theoretical flat top tube length

Unfortunately, the 14" and 18" women's frames do not have the geometry listed, but it should be similar to the 15" and 19" diamond frames. The rather steep seat tube angle and the low, straight handlebars lead to a half-leaned-forward position.


A derailer version is still available on the Commuter 1

Jamis Commuter 1 - Red - 2011
Reviews: 
Sheldon Brown on the 2007 Jamis Commuter 3

If anyone has seen a review of the new Commuter 4, or had a test-ride this year, please leave a comment.

4 comments:

Apertome said...

These look really nice. I prefer the slightly more aggressive posture, so I think I'd like one of these.

Anonymous said...

Thank you for this blog and your comprehensive and interesting accounts on the various bikes available.
L&Friends

dolan said...

Sad to see them downscale the 4 (Alfine to regular Nexus), but if it's going to get more people out there commuting on a practical bike I guess I'm for it.

Anonymous said...

I bought a Commuter 4 in April. I'm very pleased with it! It handles hills well, but you won't win any road races with it. However, it's great for riding a few miles in regular street clothes.