fullyfixed

i have an se 08 draft and have recently spend 400 dollars on a new messenger 46t crank set pedals clips straps grips bottom bracket and adapter, the upgrade is amazing! but the the cranks still flex just a tad! all of my friends bikes are super spotless and cranks dont wiggle at all, mine wiggles just the tiniest of tads but still its that little tad of a wiggle thats always in the back of my head that i was trying to get rid of in the first place! so my question is, is this normal? i didnt feel it the first day i got my bike serviced but now i do! did they gip me on the service?? cause if its unusual for the crank not be spot on perfect im ganna have them replace it and service again

Andy_K 

No, it's not normal for the crank to wiggle at all. I'd take it back and have them fix the work they did the first time.

Kenneth

this probably won't help, but my roommates crank wiggles too. it's pretty bad. i took a look at it and he just needs a new crank and bottom bracket because where the crank fits onto the taper of the bottom bracket, they don't fit as perfectly as they once did, no matter how much you tighten the crank bolt. this is mainly due to a cheap bottom bracket and crank though...and yours are not cheap

so, yeah +1 to bringing it back to where the work was done

fullyfixed

thanks for the information, it doesnt 'wiggle' it flexes the tiniest bit. so il take it back to the shop, damn cheapos

Flash_BeeZy

omniums and sg75's,dura ace FTW!

fullyfixed

is it possible that the adapter creates the wigg? seeming that the bottom brack is inside the adapter i feel the space for it to move would be a slight bit

Syscrush

So, the cranks flex a bit, but don't wiggle? What's flexing - the frame, the cranks, the BB, or what? How do you know that they flex?

monsterkidz

I'm not sure I am confident in the OP's ability to explain what exactly he is feeling.

Could be a ton of different issues. Hell it could even be a loose chain and the pedals rock ever so slightly.

fullyfixed

dear shiznig,
i know how to treat my bicycle, i just wanted to know if anyone has experienced the slightest movement as i did after upgrading.
thank you everyone

renton20

woulda been better off dropping the 400 on a new bike, draft is a POS

Ken Cox

I think the OP refers to "flex" and not to "wiggle."

All bikes flex as a function of the frame, and some crank arms and spindles flex more than others.

"Wiggle," to me, means one can, standing beside the bike, reach down with his or her hand and by pulling and pushing on the pedal cause the spindle (the shaft that connects the two crank arms) to "wiggle."

This type of wiggle usually comes as the result of loose bottom bracket cups, and one can remove this type of wiggle by properly adjusting the cups.

As for "flex," which refers to the bending of the frame, the crank arms and the spindle, one can reduce this flex by throwing money at it, but, in the end, a little bit of flex (especially in a steel frame) has some advantages; and, besides, not enough money exists to get rid of all flex (especially with a strong rider).

fullyfixed

thanks for all of your responses, iv come to the conclusion that it actually is normal, for now. thank you ken and everyone who gave a helpful insight !