Sourcing some 130mm-ish cranks

zebra67
zebra67 Posts: 113
edited November 2011 in Family & kids cycling forum
We have a single speed racing junior BMX race I'd like to modify for my 7yo son to ride in road race training & similar events. It has 175mm cranks (yep, you read that, a bike for a 7yo with 175mm cranks).

Anyway, am looking to reduce the cranks to 130mm or so. Short of canabalising off another kids' bike I'm not sure how to do it on a budget.
Can find 140mm crank set with SJS, but not sure the ring is as big as I'd like (would like to keep the large ring the BMX came with)
http://www.sjscycles.co.uk/alloy-cotter ... -prod4951/

and these on Ebay.
http://www.ebay.co.uk/itm/290501848150? ... 1438.l2649

Can anyone suggest other options?
TIA.

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