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Thread: 29er?

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    Senior Member Plow13's Avatar
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    29er?

    I've been looking for 700c wheel that accepts disc brakes...I seen Shimano Deore 29er Disc Wheelset w/ Mavic A317 Rims...does 29er = 700c? Will these wheels fit on the nashbar cyclocross frame? Also Can i use 700cx38 tires with that wheel?
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    Yes. Maybe. Yes. Roger

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    In order to figure out what width tires you can use on a rim, you need to know what the inside width of the rim is. Mavic's sit should list that for you. Sheldon Brown's site will recommend maximum tires widths based on rim width.

    Cyclocross frames in general seem to fit at least 40mm tires so 38 should fit fine but you could always call Nashbar and confirm. Also check to see what the rear dropout width is on the Nashbar frame. A Deore rear hub will be 135mm OLD but many cyclocross frames have a 130mm rear dropout spacing.

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    biked well well biked's Avatar
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    The wheels will definitely work with 700 x 38c tires, but the frame has dropout spacing of 130mm and the hubs on the wheels are spaced at 135mm, so not the best situation-

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    Senior Member miamijim's Avatar
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    Very simply, yes, 700c=29er. Welcome to Fisher marketing 101. Bianchi tried 700c mtn. wheels back in the 80's.....

    Regradless.....follow everyones advice in regards to tire sizinig.
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    Senior Member BCRider's Avatar
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    Quote Originally Posted by well biked View Post
    The wheels will definitely work with 700 x 38c tires, but the frame has dropout spacing of 130mm and the hubs on the wheels are spaced at 135mm, so not the best situation-
    This same issue came up on another thread. Yes the frame is a 130 spacing with disc brake mounts. But being aluminium means that you really do NOT want to flex it far enough to get the 135 MTB hubs to fit. Neither is it recomended by anyone that you cold set an aluminium frame like you can with steel. "Cold setting" is actually just carefully bending the metal.

    If you have the frame already the only option to go with disc is to try to find one of the apparently rare 130mm disc road hubs. I've never seen any myself but I 've never looked either. Or modify the MTB axles and cone setup to reduce the dimension between the axle nuts to fit. This will alter the brake side distance between the axle nut and the disc seating away from the ISO standard so you'll want to use a brake system that has the ISO to Hayes style adapter such as Hayes brakes, Avid BB series or some of the Shimano brakes. Some machining to the adapter may be required as they are not normally called on to be THAT adjustable.

    All in all I have to wonder what the hell the frame designers were smoking when they set it up for a 130 mm spacing.
    Model airplanes are cool too!.....

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    biked well well biked's Avatar
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    Quote Originally Posted by BCRider View Post
    This same issue came up on another thread. Yes the frame is a 130 spacing with disc brake mounts. But being aluminium means that you really do NOT want to flex it far enough to get the 135 MTB hubs to fit. Neither is it recomended by anyone that you cold set an aluminium frame like you can with steel. "Cold setting" is actually just carefully bending the metal.

    If you have the frame already the only option to go with disc is to try to find one of the apparently rare 130mm disc road hubs. I've never seen any myself but I 've never looked either. Or modify the MTB axles and cone setup to reduce the dimension between the axle nuts to fit. This will alter the brake side distance between the axle nut and the disc seating away from the ISO standard so you'll want to use a brake system that has the ISO to Hayes style adapter such as Hayes brakes, Avid BB series or some of the Shimano brakes. Some machining to the adapter may be required as they are not normally called on to be THAT adjustable.

    All in all I have to wonder what the hell the frame designers were smoking when they set it up for a 130 mm spacing.

    Like I said, "not the best situation."

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