BMX cranks on big bikes

none of the ballache.

MEGA OLD THREAD BUMP

Someone running profiles fancy telling me what the chainline measurment of a normal set of BMX cranks is?

Ta

It's adjustable via the spacers that come with the bottom brackets.
As such there is no normal chainline, you can easily set it from 42 (standard track) to much wider.

Ooh cool. Do I have to look out for a specific spindle length for the BB?

6 inch from memory.
Check the profile-racing website.

most of the time on the drive side you will have to leave out the main bearing cap and use 1-2 washers. i've used various length spindles without drama's.

will a euro bottom bracket fit in a Rondinella frame?

guido?

Helpful thread. Glad it got bumped and i saw it.

Cheers!

I've since been out and bought a pair of profile dirt jump cranks in the sales. 43% off! Yesss.
Let the trick bike commence.

and I just got an FSA Euro BB with 19mm 48t spindle in 140mm brand new from US eBay for £21.

im running an oddyssey wombolt on my bike, i just got an ordinary 22mm (because thats the spindle size) euro bb and run it off that

so wait, If I use a spider to run profile cranks. Would I still have to use a euro bmx bb?

The BB is dependant on your frame, not the cranks or spider. The spider just goes onto the spindle the same as a normal BMX chainring so it doesn't change the BB.

Profiles can be run in loads of different permutations, with a spider, chainring only, euro bb, bmx bb. Odd widths of bb can be catered for - they come with 2 different tube spacers and you can cut them up to get the perfect length for your frame. The cranks have loads of spacers too. They allow you to set your chainline how you want. As for the bolts wack on loads of locktite. All the fittings are imperial size too!

Weight wise a standard set is 1050g with out all the titanium stuff. Decent, very strong cranks i've used for years on my bmx. Quite expensive and fiddly to setup addmittedly.

Any other assembly tips just pm me.

what confuses me about all this shit, is going form road to BMX and skipping mountain bike stuff all together. If your road cranks are breaking, get some fucking moutain bike cranks. there are tons to single ring MTB cranks out there and you won't have to deal with the annoyances of BMX cranks.

what confuses me about all this shit, is going form road to BMX and skipping mountain bike stuff all together. If your road cranks are breaking, get some fucking moutain bike cranks. there are tons to single ring MTB cranks out there and you won't have to deal with the annoyances of BMX cranks.

Big wide Q factor to deal with big wide tyres though. Saying that I ran Shimano Saints for a while, worked out out

Most people probably want them for looks rather than because their road cranks are breaking. I tried them as I like BMX sprockets but I didn't need the extra strength.

The cranks stayed on for one ride. I just couldn't live with the massive q factor (even with a short spindle).

understandable..

bump.

Currently running 165 gusset hunters with a 44t profile Elite chainring, 19mm spindle and a nothing-special-BB on my ESB. The cunts now have about a millimetre of forward/backward play that while not a trainsmash, is intensely annoying.

The good people at BC took it apart last week and reckoned it was down to the chainring deteriorating, possibly as a result of my MASSIVE GUNS (or shoddy workmanship/BMX cranks not specifically designed to run fixed).

What are my options fixielordz?

burn them all.

possibly

It's the single bolt fixing.
Your options are basically shim it or get a splined chainring/spider

I'd sell the whole lot back to TS.

Spotter, along with one or two others on here recently, have had splined Gusset axles mash like cheese.

For the past couple of years I've been riding fixed/brakeless on a spline drive Profile crankset, on my ESB and now my Brooklyn Gangsta, with no issues at all.