I previously made a video about my REP Fitness J-Cups 2.0 and how I don’t recommend them because the UHMW pads that are used in them are very inconsistent and poorly sized, that the J-Cups sit extremely loose on a rack, even the PR-5000 that REP makes. The looseness of my J-Cups is pretty much in every direction, so it rattles basically anytime the bar touches it, and because it moves from side to side so easily, it’s much harder to re-center a bar if you rack it unevenly. I pretty much completely gave up on all my REP J-Cups and decided to get something else. That is, until it just randomly came to me that I can just shim the UHMW pads and make the fitment much more snug.

The UHMW is just held in place by a couple of 4mm hex bolts. If we remove these bolts, we’ll have access to the pads. I decided to take some ani-slip anti-scratch self-adhesive pads that I already had leftover from my Rouge Matador project and attach them to the back of the UHMW. Attaching to the back of the UHMW will give you a cleaner look and make it impossible for the self-adhesive pad to fall off because it’s sandwiched between the UHMW and the J-Cup. From there, I just trimmed along the edges of the UHMW, and if you use a sharp blade like I did, then you’ll be able to cut through the self-adhesive pad like a hot knife through butter and get some clean results. Then I cut out some holes for the bolts. You really don’t have to be careful or exact with this step because the bolts will completely cover the hole up. Lastly, we just have to reassemble and check for fitment.

Because the J-Cups and UHMW pads are inconsistent, you may need to shim more than one of the UHMW pads. I would recommend doing the back first because it’s a smaller pad, so it’s less work and less material needed. If that doesn’t make things tight enough for your liking, then shim the front too. From my experience, doing these two pads makes the J-Cups pretty snug.

Again, the UHMW is inconsistent, so you may notice that even after shimming the pads, some J-Cups are going to be looser or tighter than others. My left J-Cup, although snug, is nowhere near as snug as this right one. But that’s fine. Because I know the right J-Cup is super snug, I know to pull the bar towards that one when recentering because there’s less of a chance of it moving than if I pull towards the not-as-snug left J-Cup.

Overall, I’m very happy with the result of this project. I don’t think I can ask for more. I’m so happy with this that I’ve actually cancelled my order for the J-Cups that I was going to replace the REP J-Cups with. So, if you have some loose REP J-Cups 2.0 or really any other loose rack attachments, give this project a try. It’s cheap, easy, and can give you some great results.

If I’ve helped you, please use my REP affiliate link, which does not cost you anything extra but will help the channel continue to create more content! https://www.repfitness.com/#680c136b3c8e9

Self Adhesive Pads https://amzn.to/4d1xdp1

Snap Blade Knives https://amzn.to/42ITrsn

Want to support my work?

Consider visiting the shop and buying "Absolutely Nothing"
https://www.HaiHoangTran.com/shop/absolutely-nothing

Become a YouTube member!

https://www.youtube.com/channel/UCLUO-2ltlWfydRZ7pRRnXkw/join

Become a Patron!
https://www.patreon.com/HaiHoangTran

Buy some official merch!
https://www.youtube.com/haitran/store

PayPal
https://www.PayPal.me/HaiHoangTran

Just shop on Amazon via this link!
https://amzn.to/2FgsDnG