Fitting BB7

[Harryburgundy]

Nice 2000 M2 Are you going to run disc on the back too?
Last time I bought BB7s I used dotcom, maybe not the cheapest but good service.
160 is all you'll need surely?
Sounds like a nice build.

http://www.dotbike.com/ProductsP6878.as ... aign%3dDFR

 

[the great roberto]

The break thing....Drives me mad :roll: Ebay is full of Illiterati

Agree, but there are plenty on here that can't spell brake either. And that is worse. Nor do they know the difference between "there" , "their" and "they're".
Perhaps it is a generation of texters. Or maybe they should have paid more attention at school.

 

[the great roberto]

But, to ( is that two or even too) answer your question. 160mm will be fine. I have used 185 and 203's with my bb7 on the front of my stumpy. The 203 just looks stupid.
160 rotor and a carefully set up bb7 is a great braking combo. I use an xtr v on the rear. Don't waste your money putting one on the back.

 

[dyna-ti]

No reason i can see for not using a 185 rotor :?
Bombers can take it as can modern rigid forks,so i'd think a sid can handle it just as well

 

[mikesnowdon]

Dont think its necessary on a XC bike. Looks a bit odd too. A well set up brake on a 160mm rotor is plenty powerfull.

 

[N10S]

Nice Stumpjumper...really clean! I had an M2 stumpy S works myself in that horrific green color (came stock with red forks). I actually wish I could find another in that color. Those are great handling bikes that can be built-up into an ultra light XC trail runner. Sounds like thats your plan with the Middleburn duo set-up.

The sids are great forks, but they do have a tendency to twist easier and aren't nearly as torisionally rigid as a Marzocchi Z2 Bomber. A 185 up front might possibly exacerbate that twisting problem as the BB7's are extremely powerful brakes. I have used BB7's in 160/160 and 160/185 configurations. Both work great and for an XC bike I would save the added weight and stick to 160/160. In fact I just sold a set of Avid Ultimate hydro discs and I am waiting on the delivery of a new set of 160/160 BB7's myself.

Keep us posted on the bike!

 

[steveonstumpy]

Many thanks for your interest and advice people All gratefully recieved, needed & appreciated.

Well I got a great deal on a BB7 caliper & 185 disc plus a pair of rather nice Avid Speed Dial SL levers.

It'll be an XTR v on the back, I agree with the cost & non frame surgery views.

Looking at my list I reckon all I need is bottom bracket, little bb cable guide, seat clamp, chain (I do have a rather lovely Dura Ace 10 spd one. Will it work?), tyres and then cables & white outers. Getting there Mike!!!

So what tyres guys? Oh and another Ebay spelling fave PEDDLES

 

[dyna-ti]

Looks a bit odd too

185/160mm is the standard set up :shock: Always has been.
160/160mm is more likely to cause the rear end to lock up,the rotors really should be different sizes with the larger on the front.

 

[mikesnowdon]

Hi Dyna.

All I'm saying is in my opinion 185 is fairly big and looks out of place on XC bike. Besides, the extra rotor size just isnt necessary, especially with a good performing brake like the BB7. Maybe if the bike was being built for a more "AM" :roll: purpose then 185mm would be a better choice. For this build my view is that a 160mm will give more than enough braking power, weigh less, and be more 'in proportion' with the rest of the bike.