Tannus Pro and Fusion tire inserts

[jbodnar]

Can Tannus Pro and Fusion tire inserts be used with i40 mm rims and 2.8 - 3.0 tires?

 

[Greg Watts]

Can Tannus Pro and Fusion tire inserts be used with i40 mm rims and 2.8 - 3.0 tires?

Rim width isn't the issue - i40 is well above the minimum 19mm inner rim width Tannus specs for both the Pro and Fusion tubeless inserts. Where you'll actually hit a wall is tyre width.

Tannus's own catalogue only lists the Fusion in 27.5 x 2.1-2.6 and 29 x 2.1-2.6. There's no 2.8-3.0 size listed for Fusion at all - it simply tops out at 2.6". The Pro (single-layer, the thinner of the two) is described as suitable for "XC, Enduro MTB" use, but I couldn't confirm from Tannus's spec sheets whether they actually offer it in a 2.8-3.0 size - that detail wasn't in what I found, so I'd want you to check their current size chart or ask Tannus directly before ordering rather than take my word for it.

Given you're running mullet 3.0 rear setups across the Levo and the Pole, that's the practical snag - not the rim, the tyre-width ceiling on the size chart. Tannus Armour (the tube-type insert, not Pro/Fusion) does go up to 2.6-3.0" per their chart, so if it's specifically the tubeless Pro/Fusion range you're set on, that mismatch is worth confirming with them before you buy rather than assuming a 3.0 will just squeeze in - foam inserts don't stretch to accommodate a size they weren't moulded for the way a tyre carcass does.