XTR BR-M9000 Race with 160/140 rotors?
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I am building up a new 29er with XTR BR-M9000 Race disc brakes.
I would like to use 160 front and 140 rear rotors. Fork and frame are both post mounts.
Will this just be a plug and play setup?
Do I need any adapters or tips and tricks?
I would like to use 160 front and 140 rear rotors. Fork and frame are both post mounts.
Will this just be a plug and play setup?
Do I need any adapters or tips and tricks?
1956 Rudge Sport
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
It depends what size rotor your frame and fork is designed to take. It will most likely be 160mm on the front and rear, adapters are then needed to go up to 180mm plus ect. if you go 160/160 you wont need any adapters on the rear and not on the front. Its all post mount so will go straight on.
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It all depends on the frame and whether it can accommodate a 140 rear, I've been seeing a lot of bikes that can't run smaller than a 160 rotor.
On my MTBs I run 160/140 Freeza rotors with XTR 9000 brakes and have no issues. Which frame will you be using?
On my MTBs I run 160/140 Freeza rotors with XTR 9000 brakes and have no issues. Which frame will you be using?
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- Posts: 96
- Joined: Mon Oct 25, 2004 3:51 am
- Location: Detroit and Traverse City, Michigan USA
I'm building up a VeloVie Vetta 29er. (wheels due to arrive this week)
1956 Rudge Sport
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
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- Posts: 272
- Joined: Tue Jan 13, 2015 2:27 am
you need an adapter for the 140 mm rotor
Another guy posted using smaller rotors with XTR brakes and got cracked pistons
Probably due to uneven pressure on the smaller rotor / incomplete surface contact
Another guy posted using smaller rotors with XTR brakes and got cracked pistons
Probably due to uneven pressure on the smaller rotor / incomplete surface contact
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- Posts: 272
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Shimano SM-MA90-R140 Post/Standard Rear Disc Brake Mount Adapter
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IF the frame is post mount, the above adapter won't work. That's for running a 140mm rear on an IS mount frame.
Most frames that are post mount are currently designed around a 160mm rear rotor as the smallest size, especially 29ers.
Most frames that are post mount are currently designed around a 160mm rear rotor as the smallest size, especially 29ers.
I'm using 160/140mm rotors on a 29er with M9000 brakes & so far no issues. on longer descents the brake levers can pump up a little (the brake lever bite point moves further away from the handlebar), but I havent had any fade issues. that said I run the xtr trail brakes with larger rotors on another bike & as you might expect they're noticeable more powerful.
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- Posts: 96
- Joined: Mon Oct 25, 2004 3:51 am
- Location: Detroit and Traverse City, Michigan USA
I have set the bike up with 160/160.
(only about a 10g difference between my 140 and 160 KCNC Kasditor rotors.)
(only about a 10g difference between my 140 and 160 KCNC Kasditor rotors.)
1956 Rudge Sport
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
1994 Carbonframes Tetra Pro
(re-branded to Calfee 2006)
2010 Trek Top Fuel
2015 Velovie Vetta
2020 OPEN WI.DE.
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
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