mackyboboy

can anyone tell me if this combo works?

nodnerb

The sizes should be the same and the rotor/caliper combo should be fine. Shimano however, has a proprietary system for their rotors and hubs so a centerlock(shimano) rotor won't go onto a standard 6 bolt hub. If you have a centerlock hub, you need a centerlock rotor, and if you have a 6 bolt hub, you need a 6 bolt rotor.

Ymmie

They do make centerlock to 6 bolt adapters though.

nodnerb

Not sure about that. I've never seen or heard of them though but maybe they do exist somewhere.

Raiyn

The calipers don't care what they grab, so long as you have the right size for your adapters.

There is a device that will allow you to run six bolt (ISO) rotors on centerlock hubs. Howeve I don't think that's what he's looking for

willtsmith_nwi

Kudos to DT Swiss for being the first. However this one from Pricepoint is cheaper.

mackyboboy

tnx guys 4 your replies..ryt now im using a shimano centerlock disc hubs.my querry is all bout the stopping power.does the xtr rotors gives same stopping power while using an avid bb7 calipers?anyone tried this?

Raiyn

The XTR rotors won't give you any extra stopping power over anything else you'd want to use. Braking power is mainly a function of caliper type (more specifically the amount of force it can deliver to the pad) and pad material. The XTR rotor for all it's fancy features is still, at it's heart, the same steel rotor we've been using for years. The XTR rotor will give pretty much the EXACT same amount of braking power as the rotor sold with the BB7's

AfterThisNap

FYI, new XTR rear rotors are 140mm.

CaptMatt15

only if you specifically get the 140mm rear, there is still a 160mm rear XTR this year

AfterThisNap

Orly? Cool.
I've only seen the XTR rotors OEM so far and they've all been 140, which, I think, is silly.

Quick_Torch C5

Not totally true. The metallurgy of the rotor will have an effect on braking power, not just the "caliper type" or "force it can deliver on the pad",especially when considering cryogenic properties(but that's another story)
https://www.sae.org/events/bce/tutorial-ihm.pdf

However, as far as bicycle rotors are concerned, metallurgy may not have a noticeable effect on AVERAGE riders. In simpler terms, the average gay/gal may not notice the difference between an AVID rotor or an XTR rotor, but an expert DH'er may.

p.s.-to answer to OP, given the same size, the XTR rotor should work fine on your Avid brakes

mackyboboy

tnx guys..

Raiyn

Good thing we're not talking about cars. When it comes to bicycles, pad material and the caliper type are much more important than who made the rotor.

Quick_Torch C5

I just want to point out that the type of metal can make an effect on overall braking systems, regardless of whether it's a car rotor or bicycle rotor, along with pad material and clamping forces. I do agree an average person may not feel a difference.

May look the same , but the I doubt the ingredients of the rotors' materials are identical from years ago. If they are, then some Shimano engineers need to be fired

CaptMatt15

https://bike.shimano.com/publish/cont..._phase_ii.html
check out the 3rd-4th section down

the 140mm rear is really for the XC weight weenies, since you still get good power from the hydro, but save some small amount of weight with the smaller diameter

willtsmith_nwi

If you've got 160mm on the front, you only really need a 140mm on the rear. Just like cars the front wheel takes the brunt of the braking. It does little good to lock up the rear wheel.

Those of you running 29ers, you should really have a 185mm on the front with a 160mm on the rear minimum.

Raiyn

Same braking surface just different shapes and attachments. It's the different shapes, interfaces and centers that keep the design engineers employed, not metallurgy.