Chainring on Truvativ Luftalarm/Holzfeller urban cranks

Russbrom
Russbrom Posts: 4
edited August 2013 in MTB workshop & tech
Hi there. Does anyone know if a mtb sprocket can be safely adapted to fit truvativ Luftalarm/Holzfeller urban cranks. I've heard that the two crank arms are the same. But that the luftalarm was sold for bmx with a bmx sprocket. and the urban for mtb with a spider that attaches to a mtb 4-bolt chainring. I can't find a spider anywhere and have even spoken with SRAM who say that it's all discontinued. These cranks have an unusual 2-bolt affair to attach a sprocket which is completely different to any other crank.

Has anyone managed to adapt a mtb sprocket by drilling new holes? or found any other solution to this problem?

Comments

  • The Rookie
    The Rookie Posts: 27,812
    If the normal MTB ring bolts to a spider you don't have, it's almost certain it will be too big to bolt in direct, you can get MTB rings with spider for specialised cranksets though, I don't know much about them!
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.

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