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Author Message   Ft_bstrd Posted on Saturday, April 23, 2011 - 01:11 pm:        Considering doing the USD fork conversion, but it appears that although forks are available triples from X1/S1/S3 models are hard to come by. Can the M2 triples be bored out to accept the USD forks?   Phelan Posted on Saturday, April 23, 2011 - 08:12 pm:        Yes, they are from the same casting.   Ft_bstrd Posted on Saturday, April 23, 2011 - 09:22 pm:        The USD forks are 41mm and the standard is 39mm, correct?   Phelan Posted on Saturday, April 23, 2011 - 09:30 pm:        No, the uppers on the usd tuber forks are 54 mm and the M2 uppers are 43 mm.   Jramsey Posted on Saturday, April 23, 2011 - 11:02 pm:        As Phelan stated tuber USD uppers are 54mm the lowers are 41mm.   Ft_bstrd Posted on Saturday, April 23, 2011 - 11:02 pm:        Holy crap. Didn't realize that they were that big. So, the overall casting is the same for both the X1/S1/S3 clamps they just have a smaller diameter hole. That should make it fairly easy to have them machined. The stock later model XBs also had a 43mm USD fork upper as well, correct. The latest one was 47mm?   Phelan Posted on Saturday, April 23, 2011 - 11:42 pm:        All of the XB models have uppers that taper, and there were enough changes between them all that I can't keep up with them lol. I know that parts of the '03/'04 XB uppers are 54 mm and will fit in the tuber triples.   Littlebuggles Posted on Sunday, April 24, 2011 - 02:13 am:        I had my upper triple machined as my X1 forks came with only the lower triple clamp. Machinist said it wanted to chatter since it's already cut for the clamp/bolts. I thought about doing XB forks and wheels several years ago, but have decided to keep my tuber stuff stock tuber stuff.   Ft_bstrd Posted on Sunday, April 24, 2011 - 09:27 am:        Yeah, I don't want to go all the way to XB. I like keeping the parts to the same generation. I was going to keep the M2 bone stock, and well you see how long that lasted. Swapping out to XB is a lot more involved than I want to get into.

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