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  1. #1
    mtbr member
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    Big rim & small tire or small rim & big tire?

    I haven't seen this question asked yet, so I apologize if I've missed it.

    It seems that most frames won't accommodate the 100mm rim and BFL combination. What is the best compromise for snow performance? Would it be an 80mm rim and BFL combination or a 100mm rim and one of the standard snow tire offerings? Is one better than the other? The only significant benefit I can see either way is to have the larger rim and have several options of tire, which you wouldn't have if you went with the smaller rim and BFL combination.

    Any thoughts?

    Chris

  2. #2
    That Unicycle Guy
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    I started a similar thread a while ago.

    Wider tire or wider rim? - what makes more difference?

    Basically rocwandrer was the only one with real advice*, near the end of the thread.



    *not to say the other responses were not helpful but his has the best info.

  3. #3
    mtbr member
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    From what I understand the wider rim allows lower pressures without destroying the sidewall. When I run low low pressure on 70 mm rims with endo/larry , I get a lot of sidewall creases, eventually you can start to see the threads of the sidewall. I haven't ridden hundies, but it seems that one of the big advantages is the ability to lower pressure without that sidewall damage. (Not insignificant on $130 tires) It does widen the profile some, but from what I gather the lower pressure is more helpful than actual width. I would think that a BFL on 80 mm rims would be vulnerable to sidewall wear at very low pressure.

    There might be chainrub issues that have to be dealt with with hundies though, I think most non-moonlander bikes lose at least your big cog with the use of hundies. I may be wrong.

  4. #4
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    Oh yeah, and if you want to compromise, I think the new speedway rims are 90 mm.

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