disk on trek 7000, year 2000
Does anybody know anything about a 2000 trek 7000 mountain bike. My bike has two mounting holes in front of the rear axle mounts on the left side of the bike. They go straight down and are on the bottom bar, are they for or can they be used for a bracket for mounting disk brakes. And if not what the heck are they for. I'm sure that someone out there has an idea of what their for.
A picture is worth a thousand words of description......
I have and still ride a...
00 7000. It's a commuter now, but I loved it as an off road bike as well. Yes those two holes in the left rear chainstay near the drop outs are for mounting a disc caliper. However it is for mounting a VERY specific caliper. It is called a "Hayes 22mm Direct Mount", and it is very rare! The idea was to mount the caliper directly to the chainstay. It works perfectly with a 160mm rotor, but there are no other rotor size options for the rear with a direct moutn caliper. And depending on the size of the frame there are no other options for the caliper either. There are adapters running around out there that will allow the use of an IS mount caliper IF there is enough room for the adapter and caliper to fit between the chain and seat stays. Unless you have a large or extra large frame however, you won't have enough room for this option. If you do have enough room for all the hardware and can lay hands on it, there is one thing you'll have to have on any caliper that you end up with (except for the direct mount). The caliper will need to have a 360 degree rotateable "banjo" fitting for the brake line. Otherwise you'll likely end up with an untenable brake line angle leading into the caliper. This is because of the odd ball position that the caliper will be in once mounted in that area of the bike.
Originally Posted by marsha.candace
With that said, I'd start looking on ebay, direct mount calipers show up there now and then. You can also contact Hayes and find out if they still have any on hand or know of a resource for them. Another place to looks is a Trek dealer. Those that have been in business for a long time may have a direct mount or two on hand, or have a supplier that still does. If you can track down the caliper the rest is easy. The caliper will work perfectly with a Hayes HFX 9 lever/master cylinder, standard brake line, and fittings. They also use the same pistons, pads, seals etc. as the 9's. So getting parts to make them work, rebuild them and maintain them is no problem. From there the front can be a standard HFX front brake and match with the rear prefectly.
So, bottom line, your best bet is tracking down a Hayes 22mm direct mount caliper. They can be found, but are becoming quite rare as the mounting system has been obsolete for some time. You can still convert your 7000 to disc brakes but it will take some time and patience to do so.
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