Originally Posted by
dddd
I wouldn't count on more than 26t, but with proper chain length and with the axle positioned in the dropout slots to best advantage, 28t would likely be possible imo.
I usually get best shifting with the axle well foreward, but that has less to do with maximum freewheel cog size and more to do with crisp shifting performance.
These Torellis are classic performance bikes and I almost cringe to see one festooned with at-the-limit low gearing with Shimano's logo on the biggest cog. I would put on a Sunrace 7sp 13-25t freewheel or any nice older Shimano or Suntour freewheel with perhaps 13-24 or 13-26t.
I hope you are well size-fitted to your bike and enjoy it to the fullest.
Awesome advice, thanks so much!!!
Regarding a few things you mentioned, I would never, ever put one of those goofy looking Shimano freewheels on a bike like this. I actually have a 7 speed Sunrace freewheel but the largest cog is 28t. Before I resort to using it I would first like to try and find something a bit tighter.
Funny about the bike fit, this frame has the exact same top-tube, seat tube, reach, stem and head-tube length as my custom built cross bike. Of course, the angles are different, but how often does that happen when you go to look at a used bike?!