tommydelonge89

Hi, this is my first post. havnt got any much info any where, but here it goes.

recently i bought a Bianchi Pista sei giorni 2011 full bike from another party. so i've also upgraded a few parts like the crankset to a sram omnium. after the installation, i noticed that i couldn't straighten and tighten my chain how it used to be. if i tension the rear wheel, the wheel will slide to the left, if i straighten my wheels and tighten the bolts, my chain goes lose. it did not happen with my previous stock crankset which was a truvativ touro 1.1. though it was quite loose, but it was still in cycling conditions. whenever i cycle, there was this feeling of the chain and cog been rub together( not smooth when pedaling)

and so after, i also upgraded my wheels to to a mavic ellipse wheelset with a new cog. this time it was worst, i was very hard to tension my chain and centering my wheels at the same time. this time, when i center my wheels and tighten, chain will go even more loose which was also not in riding condition.

i had no choice but to bring it to a mechanic.so he actually helped me on adjusting. he did made it centered and a tension chain but it took him almost 1/2hr do make it perfect. but there was still abit of rubbing on the cog and chain.

so my conclusion was, is it normal that this is how i should be tighten my rear wheel? taking almost half an hour to perfect it? or was my bottom bracket not suited for this frame. all the problem came after i changed my crankset. wheels not aligned and noises on the drivetrain when doing some heavy pedaling. with my previous crankset, i had no problem tightening and aligning my rear wheels with problems.

is there anyone who previously owned a bianchi pista sei giorni 2011 also had this problem after changing a crankset?

seau grateau

It sounds like you're just really overthinking chain tension. It's not supposed to be tight.

Scrodzilla

That dude really sucks at his job.

Regulatori

Yeah, this is odd.

If you start to tighten one side nut and see the wheel shift, just simply stick your hand between the rim/chainstay to keep it from shifting.
Do the same on the other side in small increments.

Do you have tight clearances between the tire and seat tube? Why not just find some type of wood (stacked paint stirrers, even paper folded a bunch of times is fine lol, etc) and stuff it between the tire and seat tube gap. Just add/remove pieces until you're getting the right chain tension. Then tighten each side in small increments. The pressure against the wheel will keep the tension.

It sounds ghetto but you just have to think outside the box.

tommydelonge89

Thanks. Just that it feels odd on how complicated i had to tighten my chain and straighten my wheels at the same time. It wasnt like this with the original full bike setup. Previously it was just tightening of srews and it is good to go. Dunno whether it has smthn to do with the chainline or smthn.