Thanks. Im risking it a bit, I ordered +1T rear sprocket. See if the rear tyre still fits. By my calculation I need to move it 8mm forward from current position. If not, longer chain. Hopefully the current chain will be OK, I'd want to keep it in the short wheelbase mode. With the new 48T it would rev 12200 /12100 on straights on our hometrack plus ofcourse pull a bit better out of shikanes. It's a 2nd/3rd gear small, very twisty track.
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