sstein Posted June 6, 2008 Report Share Posted June 6, 2008 Does anyone know if you can use a normal isis bb with a set of truvativ cranks with the howitzer fitment. They seem to fit together perfectly but has anyone else tried this. Quote Link to comment Share on other sites More sharing options...
Andrew Smith Posted June 6, 2008 Report Share Posted June 6, 2008 yes they work like any other isis crank i got a pair on my jump bike Quote Link to comment Share on other sites More sharing options...
edmondraptor Posted June 6, 2008 Report Share Posted June 6, 2008 They fit on, but you'll most likely find that they hit the chain stays because they are designed to sit much further out than the ISIS versions due to the external BB cups. That said, I have a drive side Truvativ Hussefelt ISIS, but a left hand side Hussefelt Howitzer with a wee spacer behind the crank to clear the frame. It's a really close fit, like 3 mm from rubbing the chainstay, but I guess it depends on your bike and BB spindle length. Wouldn't really count on it working though, especially as the inner chainring would probably hit the frame that close in, and chainline issues. Quote Link to comment Share on other sites More sharing options...
sstein Posted June 7, 2008 Author Report Share Posted June 7, 2008 The reason that I ask is that i have a problem with my cranks alomost touching my brake at the top of the rotation as I pedal and I can not push the crank out enough. So I was thinking of using them with a 128mm isis cranks. Quote Link to comment Share on other sites More sharing options...
Revolver Posted June 7, 2008 Report Share Posted June 7, 2008 Howitzer cranks/bb have a different shaped spline than standard ISIS. You can find this out like I did, by putting (with a hammer) a standard ISIS crank on a howitzer bb, and it reshaping the crank splines. One has a BB which tapers more, and one has a bb which's splines are narrower. Either way, they're different. Quote Link to comment Share on other sites More sharing options...
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