Wheel upgrade question
07-10-14 | 08:29 AM
#1
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Wheel upgrade question
I currently have 27 x 1 1/8 wheels. The rims measure to be approx 25 1/4" (641mm). In a perfect world, I'd swap them for rims that measure more like 650mm to give a bit more to the short reach calipers that I've already installed. If I understand the standards correctly, rims for current 700c wheels measure in at 622mm.
So...the question: Are there modern rims that measure in at 650mm?
Thanks.
So...the question: Are there modern rims that measure in at 650mm?
Thanks.
07-10-14 | 09:04 AM
#3
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Right your 27"/630 are the largest except some odd old Raleigh 3 spd.
There are 650 b and c rims but strangely they are smaller.
There are 650 b and c rims but strangely they are smaller.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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07-10-14 | 09:09 AM
#4
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miamijim and Bianchigirll....thanks for your responses. Yeah, I just found some additional info on Sheldon Brown's site. So 700c wheels have a 622mm bead seat diameter. And my 27 inch wheels have a 630mm BSD. So my perfect world would have included a 640mm wheel....which as you indicated doesn't exist.
Thanks again.
Thanks again.
07-10-14 | 10:05 AM
#5
Doesn't make more sense to look for brakes to fit the wheels instead of wheels to fit the brakes? It will probably be much cheaper.
07-10-14 | 10:08 AM
#6
What??? Only 2 wheels?
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Nobody ever said bike dimensions had to be rational. 
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07-10-14 | 12:33 PM
#7
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+1 A lot of vintage frames require medium or long reach brakes. Modern short reach brakes just aren't right for most bikes with 27inch wheels.
07-10-14 | 12:44 PM
#8
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07-10-14 | 04:35 PM
#9
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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●
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