I just picked up a GT all terra outpost. I am9 wondering if the spacing is 130mm or 135mm, it looks to be at 133mm. Any help is much appreciated! by Denimbread Bicycling Bike Bike Repair Biking Cycling Repair
DukeOfDownvote on January 29, 2026 6:28 pm As far as I can tell your caliper is reading 135.6mm Edit to add: you read by the 0 for the scale of mm, then whichever mark on the slide is closest to long up with the mark on the main piece. So 135+ .6
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135mm, which is what the caliper reads.
As far as I can tell your caliper is reading 135.6mm
Edit to add: you read by the 0 for the scale of mm, then whichever mark on the slide is closest to long up with the mark on the main piece. So 135+ .6