legalize_it
12-10-03, 10:49 AM
just out of curiosity, are the tire clearances on the steamroller big enough to run 27" rims?
Singlespeed & Fixed Gear - surly steamroller clearance question
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hoodie
12-10-03, 10:51 AM
? 27" is smaller diameter than 700c (28" +/-)
Gonzo Bob
12-10-03, 11:28 AM
? 27" is smaller diameter than 700c (28" +/-)
Nope. A 27" rim has a 630mm bead diameter which is 8mm larger than 700C which is 622mm. A 700Cx23 tire is actually about 26.3" in diameter, not 28".
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
Nope. A 27" rim has a 630mm bead diameter which is 8mm larger than 700C which is 622mm. A 700Cx23 tire is actually about 26.3" in diameter, not 28".
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
hoodie
12-10-03, 11:34 AM
Nope. A 27" rim has a 630mm bead diameter which is 8mm larger than 700C which is 622mm. A 700Cx23 tire is actually about 26.3" in diameter, not 28".
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
GB, thanks for the lesson, I always just assumed ...doh!
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
GB, thanks for the lesson, I always just assumed ...doh!
legalize_it
12-10-03, 11:34 AM
Nope. A 27" rim has a 630mm bead diameter which is 8mm larger than 700C which is 622mm. A 700Cx23 tire is actually about 26.3" in diameter, not 28".
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
thanks for the good info!
Since the 27" rim is 4mm higher at the brake caliper, there could be issues getting the brake shoes adjusted to hit the rim.
But if the brakes shoes can be adjusted, a 27" wheel will work. You just have to run a narrower tire (about 4mm narrower). For example: if the frame can fit 700Cx38, you should be able to fit up to 27x1-1/4" (about 32mm wide).
thanks for the good info!
surreal
12-10-03, 01:02 PM
how much does it suck to run 700c's on a bike designed for 27ers? i've heard it's ok, with some issues, blahblahblah, but i need to hear a definitive answer, if anyone is lucky enough to have one. =)
-rob
-rob
legalize_it
12-10-03, 01:19 PM
how much does it suck to run 700c's on a bike designed for 27ers? i've heard it's ok, with some issues, blahblahblah, but i need to hear a definitive answer, if anyone is lucky enough to have one. =)
-rob
personally, i think running 700c's on a bike designed for 27's is ********. i have a fixed raleigh w/ 27's, a SS motobecane w/ 27's, and my gf has a fixed shogun w/ 27's. bling bling. i just dont think its right to take away the bicycles right to roll on its original, and intended tire size. (with some exceptions)
-rob
personally, i think running 700c's on a bike designed for 27's is ********. i have a fixed raleigh w/ 27's, a SS motobecane w/ 27's, and my gf has a fixed shogun w/ 27's. bling bling. i just dont think its right to take away the bicycles right to roll on its original, and intended tire size. (with some exceptions)
bombusben
12-10-03, 01:22 PM
surreal- its doesnt suck at all.
If you run brakes, you might need a longer caliper or use a drop bolt. Either works without a problem.
If you have long cranks, you can't lean in turns as much. I've got 170's on a 27 frame w/ 700c right now and no problems.
You'll find a much better selection of wheels in 700c
You'll have extra clearance if you want to run fat tires or fenders
If you run brakes, you might need a longer caliper or use a drop bolt. Either works without a problem.
If you have long cranks, you can't lean in turns as much. I've got 170's on a 27 frame w/ 700c right now and no problems.
You'll find a much better selection of wheels in 700c
You'll have extra clearance if you want to run fat tires or fenders
OneTinSloth
12-10-03, 01:50 PM
all of my road/track frames are designed for 27" wheels. i'm running 700s on all of them. why?
you try finding 27" open pros or cxp33s.
you try finding 27" open pros or cxp33s.