Feedback Sports GRVL Grindr rollers? Sea Otter Classic might be late, but it’s not short on new parts from brands big and small. Here’s our first of many roundups, featuring new components and concepts.
Above are the prototype GRVL Grindr rollers from Feedback Sports, using sustainably harvested gravel that you can customize to match whatever racecourse you’re training for. They’ll help build muscle memory for the vibrations while helping you sort out proper tire selection and air pressure. But that’s not all…
They also get you ready for the fun with resistance tuned to keep you riding at a party pace while promoting mustache growth. Want one? Probably best to just start gluing things to your own rollers (don’t actually do this) as it’s not likely it’ll ever really be made. Sorry.
Kogel Kolossos OS Pulley for Shimano MTB
Adding to their Kolossos line of oversized derailleur pulleys, they have a version for Shimano 12-speed mountain bike rear derailleurs. The cage uses their stiff, CNC’d design that replaces the entire lower cage and pulley on the stock derailleur.
This one’s a final prototype that hasn’t been anodized yet, but will feature the same ceramic bearings as the ones for Eagle, GRX and road groups. The lower pulley has 18 teeth, and introduces their first narrow-wide tooth profiles for better chain management. The upper pulley has 14 teeth.
Price is $399, available by January for XT and XTR for sure, and they’re testing for SLX.