What fork seal fits a Triumph Speed Triple?

The Triumph Speed Triple uses a front fork that changed across model years: 45 mm (1999–2004), 43 mm (2005–2015). 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 Speed Triple fork?

The Triumph Speed Triple has a front fork that changed across model years: 45 mm (1999–2004), 43 mm (2005–2015).

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 Speed Triple.

Triumph Speed Triple Fork Seals

Q: What fork oil does the Triumph Speed Triple use?

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

Fork specs for the Triumph Speed Triple vary by year (see the table below).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.

Years	Fork tube
1999–2004	45 mm
2005–2015	43 mm

Kit	Years	Seal size	Replaces OEM
55-120	2005–2015	43x54x11	Ducati 34920261A, Ducati 34920211A
55-124	1999–2004	45x57x11	Honda 51490-MCA-003
57-101	1999–2004	n/a	n/a
57-108	2015	n/a	n/a
56-133-1	2005–2014	n/a	n/a
57-108-1	2005–2014	n/a	n/a
56-133	2015	n/a	n/a
56-139	1999–2004	n/a	n/a