Suction Cup Bike Rack Adapter 9/12/15/20mm Diameter 100/110mm Axle Length for Car Roof Top Sucker Bike Rack

Be aware, this is not a full set of different sized spacers as the advert would indicate, especially since there were no options to select the size I actually needed. The size is also not mentioned in the product description and it mentions all sizes so it is an easy assumption that it includes all sizes, especially considering the price, which is not the case. For 170+ AED / $40 for 2 small pieces of plastic bushes it is ridiculous. I really don't know why they should need to be purchased separately anyway, ROCKBROS should send a full set of adapters with the suction cup mounts.

They fit on my fox 36 perfectly great choice for boost bikes I haven’t had any problems

High-quality IM part performed as advertised and made the Rock Bros. suction cup roof rack useful with my mountain bike.

Fits perfectly.

Ordered the 15x110 adapter as shown for my 15x110 fork but the fork doesn’t rest on the adapter and there’s nearly a 1” slop of play. Can’t recommend. About to return the whole RockBros setup. So frustrating as I needed this for a trip. *Update* +1 Star Coordinated with customer service and got the correct fitting spacer. It appears that a 15x100 spacer was placed into a 15x110 package, which was my suspicion but was initially met with disbelief from customer service staff and was told that my 2023 Fox 36 is not a compatible fork and that it was impossible their warehouse could have messed this up. They eventually apologized and again did send me assurance of fixing this in the future as well as the proper spacer. On the actual fitting product, it performs as expected EXCEPT that is doesn't quite fit well enough to where one can comfortably rest your bike/fork on the spacers - as you would on your wheelset - so you're left with delicately balancing/holding the bike/fork in place on the spacers with one hand while the other hand finds, grabs, and installs the thru-axle. Tightens fine and I don't believe the bike is going anywhere but I really would love an update to the design or improved tolerances so that I can set/rest my bike onto the spacers directly without having to fiddle with a balancing act.

I have yet to be able to use this product and here’s why: I ordered the correct size end caps 15/110mm it appears, but the quick-release rod is too short to extend through my front fork in order to secure it in place withy front fork quick release rod. And the need bigger sized springs and a lug nut or whatever is at the other end of this quick release rod. In the last picture here you can see that my front tire rod is the correct size but I do not have the correct springs and a tightener end cap for my bike rod. Can anyone help? I've reached out to Rockbros but have yet to hear back.