[rc51kid]

i have been using v brakes all this time. I m going to disk up front. I only weigh 130lb and try to keep my XC race bike as light as i can. Can i run 140mm disk up front with a BB7? wouldnt a 140mm still be stronger than V brakes?

 

[nepernesu]

first of all, idk what fork accepts a 140mm rotor. Also, 160mm rotor is the standard minimum up front, I think, and barely heavier than 140mm. You will only benefit from increased braking power, provided you have decent braking skill. Don't create a problem where there isn't one, and have fun riding

 

[Squash]

As nepernesu noted, I am not aware of any MTB fork that will work with a 140mm rotor. All MTB forks with post style direct mounts are sized for a 160mm rotor minimum, with the exception of some down hill forks which start at 180 and go up from there. And no one I know makes a 140mm IS adapter for IS mount forks. For the front I'm afraid that your pretty much stuck with a 160mm rotor.

Good Dirt

 

[rc51kid]

160 is fine. I was just trying to see what my option are.

 

[Sheepo5669]

Its about a 15g difference between 140-160. I had the same thought process and went with 160 but now im debating goin 180.

Sheepo

 

[Joules]

If you care about weight at all (or at least enough to think about using a mini-rotor), why would you even consider a BB7?

 

[mimi1885]

I've tried 140mm f/r on my road bike, even that I think it sucked. It does not have crisp response. I'd say stick with 160mm.

 

[mmountainbiker]

My advice to you is to gain some weight.

 

[cockroach]

How about 160 front, 140 rear?
That's what I run, I like to have more power front than rear, but I don't need any more than 160 front.
Plus, I like to be a bit different...