Animal bikes sprocky balboa sprocketanimal bikes specialises in the production of bmx bikes and associated technical components parts include sprockets tyres stems rims pedals and seat posts and many of these are available in a range of colours so you can colour coordinate these with your frame and forks keeping you looking good specifications material cnc machined 7005 series aluminum fit 19mm and 22mm spindles chain fit 18 bolt requirement fits standard gear bolt that comes with 2