What fork seal fits a Beta RR 4T 390 X-PRO?

The Beta RR 4T 390 X-PRO uses a 48 mm fork. We stock the manufacturer-verified seal and bushing kits for it; matching is done off the verified application list, not just the seal size.

What size is the Beta RR 4T 390 X-PRO fork?

The Beta RR 4T 390 X-PRO has a 48 mm fork.

Can I use any seal with the same dimensions?

No. Fork seals can share a size and still not seat correctly in a different fork design, so use the seal verified for your bike. The kits listed here are confirmed by the manufacturer to fit the Beta RR 4T 390 X-PRO.

Beta RR 4T 390 X-PRO Fork Seals

Q: What fork oil does the Beta RR 4T 390 X-PRO use?

The Beta RR 4T 390 X-PRO uses 5wt fork oil, about 540 ml per leg (factory fill Motul 5wt (KYB AOS spec)).

The Beta RR 4T 390 X-PRO runs a 48 mm front fork.Every kit here is verified by the manufacturer to fit this exact bike. Fork seals can share a size and still not seat in a different fork, so we only list what is confirmed for your bike.