May 11, 2010

XT cassette mods

I keep getting pestered by people interested in buying a modified cassette (see This One Goes to 11 for more details) so here’s the official word.

I will sell you the following, shipping in the lower 48 included, for $120:

-XT M770 (11-32 or 11-34) cassette with back side driveshell removed (depending on your hub, you may or may not need to run a spacer or two inboard to clear the spokes)

-I will also remove the outboard drive shell down to the smallest cog on the carrier. This means you’ll also need a spacer in most cases to run a separate single cog (or two). Essentially, I remove as much material as possible from the drive shell of the carrier-mounted cogs, meaning that you’ll use spacers to fit tune the fit.

-For those who have some chainring size flexibility, or do not need a super-low bottom gear, I recommend the 11-32 model. The 11-32 has 5 cogs on a spider (18,21,24,28,32) and 11,12,14,16 cogs separate. This means you have a good deal more flexibility if you can fit even one single cog onto the cassette body. The 11-34 cassette spider/carrier has 6 cogs (17,20,23,26,30,34), meaning that unless you can fit 7, you’re stuck with the 17 as your highest gear.

-I also remove the “key spline” so that the cassette will fit onto King or other hubs that are non-keyed.

-Wait time is typically about 2 weeks, I make each cassette to order.

-As of now, there is not a 10 speed cassette that will work well for SS hubs. 9 speed is it, sorry!

-A +/- 1mm spacer kit is available for $25 if your hub didn’t come with any. You will want to be able to *precisely* fine tune the position of the cassette on the hub in order to fit as many gears as possible.

If you already have a cassette and want to have it modified, the cost is $65, return shipping included. Please email me to confirm that I can work with the cassette before sending it.

Keep in mind that using these modified parts on your bike requires decent mechanic skills – if you’re not good at working on your own bike, don’t even ask. If improperly set up, using these parts could easily destroy your rear wheel, derailleur, chain, and more. I am offering no guarantees or warranties – this is a mod that is NOT approved by Shimano. For what it’s worth, though, I have been running it for 6 months with no problems.

Want one? Click on the PP link and order away.

11-32 without key spline
11-34 without key spline
11-32 with key spline
11-34 with key spline