Does anybody know what IS size calipers are available. They offer a 140 rear so that would equate to a 160 front, but do they make a bigger size that would allow 180 front/ 160rear without going to postmount+ brackets. Cheers.
Yup. According to QBP anyways, you can run the 160 rear XTR caliper, 180 on the front. and it is IS. But you might want to get another source to verify this.A MAN CALLED HORSE said:What i meant was can i run 180 front and 160 rear with dedicated IS calipers- not postmount with brackets. The 140 rear IS caliper will be able to run 160 on the front. If they make a dedicated 160 IS rear caliper then that would equate to 180 on the front. Cheers.
ok, but the distance from the IS brake tabs to the 160mm braking surface is different front and rear, so a rear caliper used in the front allows you to run a 20mm bigger rotor.Ronnie said:As far as I know there is only one caliper size in IS mount. It fits a 160mm. rotor. If you want to use it with a 180mm. rotor you need one of these.
Ronnie.
No way! Here is the 180mm. adaptor for the rear brake.crisillo said:ok, but the distance from the IS brake tabs to the 160mm braking surface is different front and rear, so a rear caliper used in the front allows you to run a 20mm bigger rotor.
Yes Ronnie.... what I say is... if you put the rear caliper "incorrectly" in the front you will be able to run a 180mm rotor without an adapter........Ronnie said:No way! Here is the 180mm. adaptor for the rear brake.
Notice the part numbers.
Front: SM-MA-F180S/S (Notice the F)
Rear: SM-MA-R180S/S (Notice the R)
Ronnie.
I also use only post mount. In fact I prefer it to IS. No shims, easy to adjust. I use a post mount (front) XTR caliper with an adapter on the back of my bike. I don't care about a few grams.crisillo said:Yes Ronnie.... what I say is... if you put the rear caliper "incorrectly" in the front you will be able to run a 180mm rotor without an adapter........
EDIT: I know my shimano parts too.... I have all the PM to IS Shimano adapters in 160mm, 180mm and 203mm so I know how to "decode" the part numbers, even if I don't use IS to IS adapters such as the ones you posted...
Radial it is 10mm , in diameter it is 20mm..... if you have the PM-to-IS adapters around just compare a 160mm rear adapter and a front 180mm, they are identical when aligned....Ronnie said:I also use only post mount. In fact I prefer it to IS. No shims, easy to adjust. I use a post mount (front) XTR caliper with an adapter on the back of my bike. I don't care about a few grams.
Are you sure that the radial difference between the front and back IS calipers is exactly 20mm.? I have a XTR IS rear caliper here but I don't have a IS fork to check it with.
Ronnie.
Anyone have this rear adapter in the States?Ronnie said:No way! Here is the 180mm. adaptor for the rear brake.
Notice the part numbers.
Front: SM-MA-F180S/S (Notice the F)
Rear: SM-MA-R180S/S (Notice the R)
Ronnie.
I reckon that any LBS could order it from Shimano for you if you give them the part number.VR46 said:Anyone have this rear adapter in the States?
I just remembered that AE Bike have the full selection of Shimano adaptors:VR46 said:Anyone have this rear adapter in the States?
Cool...thanks. Shimano USA wasn't going to have them until March, but AE has them in stock.Ronnie said:I just remembered that AE Bike have the full selection of Shimano adaptors:
51mm. front for 180mm. rotor
51mm. rear for 180mm. rotor
Ronnie.