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650cm wheel in front(10 posts)

650cm wheel in frontdavedigi
Dec 10, 2001 6:34 PM
I am looking at a Jamie Ventura. It has 700x23 back wheel and a 650x23 front on a size 55 frame. Any opions on why they did this? Any disadvantage? Thanks.
re: 650cm wheel in frontdavedigi
Dec 10, 2001 6:46 PM
Ignore this, the 650cm front wheel is on the 47cm frame only.
re: 650cm wheel in frontguido
Dec 10, 2001 7:12 PM
Smaller front wheel makes it possible to build a 47mm frame with a horizontal top tube. Georgina Terry was the first US builder to market a bike with a 650C front wheel, for many women who are too small for standard road bike sizes. People say smaller wheels roll faster and are gyroscopically very stable and smooth riding. They're also a slightly lighter set-up than 700C, and accelerate really well. On this reason, Schwinn marketed a 650C racing bike in the early nineties but it didn't catch on.
I mean 47 centimeter frame, duh..nmguido
Dec 10, 2001 7:15 PM
650cm wheels for men too !Patricia
Dec 10, 2001 9:23 PM
Bikes with both front and rear 650cm wheels are more and more used by not so tall men- Laurent Jalabert being one !
One drawback only, so far : there isn't a wide range of 650cm wheels but it's changing, Mavic is thinking of devising some.
650cm wheels for men too !C-mond
Dec 11, 2001 5:42 AM
WHat gear combo are these 650cc riders running up front- 55t or what????
650cm wheels for men too !guido
Dec 11, 2001 10:53 AM
Interesting that Laurent Jalabert uses 650C. That should forever belie the common prejudice among performance addicts that smaller wheeled bikes are "wimpy." 650C wheels offer less roll-out, however, and require larger chainrings, 54, 55 tooth, which would be easier to get if more people used them.
Not an accurate statement...TJeanloz
Dec 11, 2001 11:21 AM
It is inaccurate to say that JaJa uses a 650c bike. It would be correct to say that he has ridden one before under particular circumstances.

He rode a custom 650c bike in the most mountainous stages of the 2000 and 2001 Tours de France (and other climbing stages in other races). He did so because he felt that the very light 700c equipment compromised stiffness, and he was able to build a 14.98lbs bike stiffer with 650c wheels and a compact frame.

He does not ride 650c wheels more than a handful of times each season.
disadvantagesmr_spin
Dec 11, 2001 9:26 AM
I can think of a lot of disadvantages. Mainly you have to carry two sizes of spare tubes in your pack. You have to buy different sized tires (I'm sure you knew that). But most important, 650 tires and tubes are typically more expensive and often harder to find in smaller shops.
also has higher rolling resistance. -NMTig
Dec 12, 2001 10:02 AM