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PostPosted: Tue Apr 12, 2011 8:39 am 
Retro Guru
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Location: Surrey
Hi all,

Ive got a 2007 Rocky Mountain Blizzard with Rock Shox Recon 2008 Forks I'm building up.

What size disc should I go for, I will be using the latest Shimano XT disc brake levers/calipers.

Seems the obvious sizes are 160mm or 180mm.

Type of riding is x-country nothing too mega but I don't wont to think if i get the 160mm that i should of got the 180mm.

Many Thx


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PostPosted: Tue Apr 12, 2011 8:43 am 
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Location: Poppy Fields
I would say go for the 180s as your brake should have enough modulation to control them if they are a little too much.

I run 183 on the back and a 203 on the front and they are fine.


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PostPosted: Tue Apr 12, 2011 11:04 am 
Gold Trader
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Location: Odense, Denmark
Depends on your braking style....

Personally run 180 front 160 rear most of the time.

But would run 180 rear for longer descents.


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PostPosted: Tue Apr 12, 2011 11:55 am 
Gold Trader / rb Rider / Special
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203's! :lol:

but no seriously either would suit you fine
i normally run 203's which give awesome bite for locking up the wheels
currently running 160's and they aint all that bad, slightly harder to lock the wheels
for what your doing will be fine though
but id still go 180


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PostPosted: Tue Apr 12, 2011 9:25 pm 
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Thx all 180's it is


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PostPosted: Tue Apr 12, 2011 9:53 pm 
Anglian Deputy AEC
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Location: Livin' in a dust bowl
Wow, hold yer horses.

I have a 2009 Rocky Mountain Vertex. Came fitted with Formula Oro K24 brakes with 160mm rotors front & back. I am over 16st and they provide more than enough braking power.


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PostPosted: Wed Apr 13, 2011 7:54 am 
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Location: Platsa, Messinias, Greece
I'd use (well, I do use) 180mm front, 160mm rear.

Plenty big enough, IMHO.


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PostPosted: Wed Apr 13, 2011 1:52 pm 
Old School Grand Master
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Location: Whiskey bent & hellbound!
180 front 160 rear, Saint caliper front, XTR rear.

Works a treat


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PostPosted: Wed Apr 13, 2011 2:27 pm 
retrobike rider
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180/160 again here.

160/160 were just fine too but I canged to 180 up front so I can swap wheels between bikes as one would only fit right at 180mm.

I have 622mm on my road bike, the pads grab just below the tyre bead. They stop me just fine at 40mph.


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PostPosted: Wed Apr 13, 2011 2:40 pm 
Gold Trader / rb Rider / Special
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:lol:


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