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rotor size for street bike

JTVW

Monkey
Jun 17, 2004
373
0
somewhere hot
Hey yall
I'm going to buy a new Avid Juicy 7 for my P1 and I am wondering what rotor size is best. I don't want the biggest size, cause I think it will be too big, and I don't want to bash it into crap while pulling gnarl-esque street moves. So the real question is this:
Is the smallest rotor size going to provide me with enough power. Btw I can get the smaller rotor size for 155 dollars, while the medium sized one is $185, so that kind of makes a difference. Is it worth the extra money for the added stopping power? Or should I save the money?
Thanks for your help. :)
 

Rik

Turbo Monkey
Nov 6, 2001
1,085
1
Sydney, Australia
Go 6", or run V brakes if you can. I can't see any reason against V's for street, but I can see many for them (less likely to trash, simpler, better for bmx/trialsy moves)
 

dexterq20

Turbo Monkey
Mar 6, 2003
3,442
1
NorCal
Rik said:
Go 6", or run V brakes if you can. I can't see any reason against V's for street, but I can see many for them (less likely to trash, simpler, better for bmx/trialsy moves)
Hmmm, oh I dunno, maybe if YOUR WHEEL GOES OUTTA TRUE? Cuz, ya know, riding with a rubbing brake because you knocked the sh!t outta your wheel is a helluva lotta fun. :rolleyes:


Please, for the good of the cause, get a 6" disc brake.
 

Rik

Turbo Monkey
Nov 6, 2001
1,085
1
Sydney, Australia
Knocking wheels out of shape on street? Well... I guess it depends what you do on street. I would've thought you'd have a hard time to really pull a wheel out of true when streeting, unless you borked up some rotation moves.

But, what about when your rotor gets bent? or your caliper gets smashed? Very likely with BMX-style stuff. Plus stalling/hopping with discs never feels pleasant to me, having the pads move around in the caliper is rather off putting.

Which leads me to ask the question: Why on earth are there so many street-specific frames coming out that lack cantilever mounts?
 

JTVW

Monkey
Jun 17, 2004
373
0
somewhere hot
thanks for the replies
my p1 has no v-brake mounts, and they aren't powerful enough anyway
I don't grind or anything, so the small rotor size is unlikely to get bent
and I have the amazing ability to completely botch all 180's, which really takes a toll on your wheel
I think I'll go with the 6", and I will order them tonight!
 

Funky Monk

Monkey
Jul 17, 2003
181
0
near El circulo Polar Arctico
Rik said:
Which leads me to ask the question: Why on earth are there so many street-specific frames coming out that lack cantilever mounts?
manufacturers have learned that disc brakes 0wN!!!!!!11one1.

but seriously, I think v's are fine with a street bike that's prone to get beaten to **** in no time...less bling as well.

If your a poser like me then the hope 6pots are a must.
 

D_D

Monkey
Dec 16, 2001
392
0
UK
Rik said:
Knocking wheels out of shape on street? Well... I guess it depends what you do on street. I would've thought you'd have a hard time to really pull a wheel out of true when streeting, unless you borked up some rotation moves.

But, what about when your rotor gets bent? or your caliper gets smashed? Very likely with BMX-style stuff. Plus stalling/hopping with discs never feels pleasant to me, having the pads move around in the caliper is rather off putting.

Which leads me to ask the question: Why on earth are there so many street-specific frames coming out that lack cantilever mounts?
Street varies massivly depending on the local terrain. Where I am practically everything has a hard 90* edge. Even with high tyre pressure it's easy to ding a rim which is a pain with rim brakes.

Also many people use there street specific frame for other uses. For me being able to use the same bike for street / xc etc. is a big advantage, rim brakes and mud don't mix so I use disks.
Plus disks are seen as better and cooler than rim brakes which matters for a lot of people.

Still if I only rode street I would proberly use rim brakes. Most of the braking I do is quickly locking up the wheel. Rim brakes are a lot more consistant under such conditions. I find with disks they get worse and worse until I have to blast down a hill a couple of times to get the power back.
 

Rik

Turbo Monkey
Nov 6, 2001
1,085
1
Sydney, Australia
I agree with your points D_D, but does having cantilever mounts detract from the bike at all? It's a shame that they're being neglected.
 

Curb Hucker

I am an idiot
Feb 4, 2004
3,661
0
Sleeping in my Kenworth
Rik said:
Knocking wheels out of shape on street? Well... I guess it depends what you do on street. I would've thought you'd have a hard time to really pull a wheel out of true when streeting, unless you borked up some rotation moves.

But, what about when your rotor gets bent? or your caliper gets smashed? Very likely with BMX-style stuff. Plus stalling/hopping with discs never feels pleasant to me, having the pads move around in the caliper is rather off putting.

Which leads me to ask the question: Why on earth are there so many street-specific frames coming out that lack cantilever mounts?
my street wheels get more abuse than DH wheels. When trying rotating moves, wall rides, park riding, and other crazy crap, the wheels get messed up