What fork seal fits a Triumph Thunderbird?

The Triumph Thunderbird uses a 43 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 Triumph Thunderbird fork?

The Triumph Thunderbird has a 43 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 Triumph Thunderbird.

Triumph Thunderbird Fork Seals

Q: What fork oil does the Triumph Thunderbird use?

The Triumph Thunderbird uses 10wt fork oil (factory fill Showa SS-8 / Kayaba (SAE 10)).

The Triumph Thunderbird runs a 43 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.