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how safe is super tight clearances in the rear on a steel framed bike (since they do flex)?>
Not only do steel frames flex but wheels sometimes go out of true. It is, in general, not a great to push things to their limits. If 27mm is tight I'd keep to 25mm or less. Why do you think you need 27mm? Why do you want 27mm?
EdwardZ
edscoble
Currently running a 27mm Conti GP tire in rear (steel framed bike) and the tire has close clearances: 2-3mm between the tire and chainstay/seatstay bridges and both chainstay sides.
I had some spare links but think they were thrown out..even moving the tire back a 1/2" won't do much..maybe add an extra mm.
I did a 30+ mile ride the other day and couldn't find any rub marks/hear rubbing sounds. The bike has an almost silent drivetrain so I would hear it.
The tire is almost new and I don't want to bin it...how safe is super tight clearances in the rear on a steel framed bike (since they do flex)?
I'm purchasing 25mm soon for front/rear but curious if this is even safe.