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I have got the job of fixing the GF's bmx.
Unfortunagly the pedal has mashed the threaded insert on the right hand crank.
I cant find a replacement right prima 175mm square taper (could be powerbites 1).
Any recommendations for sourcing one or replacement crank set. Are bmx bottom brackets all the same size?
I sort some photos out later.
Many thanks,
RT
The crank interface is unique to Primo Powerbite/Hollowbite cranks - most use splined axles.
Very very early Primos used a 19mm diameter axle, but most use 22mm axles.
Pull out the axle and measure it - you can get 48T spline axle cranks from most a multitude of brands in both 19mm and 22mm.
try searching for Primo 😉I cant find a replacement right prima 175mm square taper
Nope. Powerbites have a 22mm axle so the bearing inner diameter will be 22mm. A lot of cranks are 19mm (profile etc) but some others are 22mm e.g. Odyssey Thunderbolt. Check what kind of BB shell you have a well, could be American, Mid or Euro, although unlikely to be euro if you're running a 22mm axle as that doesn't leave much room for bearings. If the bearings push directly into the frame it's a mid BB, if there are cups pressing into the frame that the bearings then sit in it's an American BB.Are bmx bottom brackets all the same size?
Actually I *think* I've got a spare set of primo powerbites that are in fairly rough condition but AFAIK structurally sound. You can have them for postage costs, which will be a bit as they are heavy as a heavy thing.Any recommendations for sourcing one or replacement crank set
@steveit
I send you some pix.
Okay, got a link instead as I'm sure you're 'pics' will have been rejected by my works firewall.
THANK YOU Stevet1
The cranks have worked a treat 🙂
I hope I have the opportunity to pass on some of my kit to others on here if it helps out.
PS: I know the chain is slack.
[url= https://c3.staticflickr.com/6/5653/31035179842_552acee439_o.jp g" target="_blank">https://c3.staticflickr.com/6/5653/31035179842_552acee439_o.jp g"/> [/img][/url][url= https://flic.kr/p/PhtpHC ]P1370261[/url] by [url= https://www.flickr.com/photos/58162507@N07/ ]SGMTB[/url], on Flickr
One again many thanks.