Bit of a techy question…I have just built up a small klein attitude comp, about 99/00 ish i think so well into the trek period.Wanting to fit discs to it… It has 2 holes on the left hand chainstay near the dropout end-are these to attach a bolt on dosc mount? Anyone?

Or is there an a2z adaptor or something?

thanks all..

you need one of these

one of these

Hi, just built one of these up for a mate.

the holes are for an old Hayes rear caliper that is no longer in production but the A2Z mount will convert this to international standard ,HOWEVER it will require the disc upgrading to one 20mm-25mm larger .
you'll also need quite a few shims as it leaves quite a large gap between mount and caliper , I custom made a pair of spacers from the large spacers from v brake pads (the one that alter pad angle)

The only problem here is that only a caliper designed for a 140mm-145mm rotor (needing a 160mm-165mm once A2Z adaptor is fitted)will fit as anything bigger would foul the seatstay and not fit in the gap.

I have seen those but thats not the position of the holes. They are on the chainstay itself, near the dropout and the holes are vertical rather than horizontal. Hmm…

right well, i had a '00 attitude, and an '01 OCLV carbon, and that is the adaptor you need to run a disc (i went through a phase of buying treks)

if you aren't sure, send me a photo of said dropout.

If it's on the chainstay, not the seatstay, then the adaptor shown by Carlos (a Hayes 22mm mount adaptor) will sort the problem, but as he says only a very small caliper (i.e. a 140mm rotor one, which is the same fitting as a 160mm front) will fit. It may require some bodging.

Tricky then. I was going to run old lx discs with a 160mm 6 bolt rotor. Would this not be compatible then I take it?

I am very happy to bodge, incidentally, and as its 'her' bike, not fussed if it looks like it was made by a committee either…

Like that?

"A2Z AD-PMR" adaptor from that, to IS as above

Here's the one I built

LX discs use adaptors to fit, don't they? You could make it work with a front 160mm shimano mount (like the one in the link) as well as the mount above, then it'd fit.

http://www.chainreactioncycles.com/Models.aspx?ModelID=13743

I'd say stick with the real shimano part as I found many other adaptors just wouldn't fit shimano calipers.

Carlosg has it bob on.

hold on.

right then in my hand i have a hope closed two that fits straight on there with no mount.if you want it its yours?

Hi all thanks for your help….I have found the following adapter online for about £16 posted from Toronto. Seems to work with my lx rear caliper by the look of it…