Impac by Schwalbe Tube 29 x 1.5 - 2.35 & 27.5 x 2.0 - 2.35 (Presta Valve 40mm)

Impac by Schwalbe Tube — 29 × 1.5–2.35, Presta FV 40 mm

A durable, no-fuss butyl tube for 29er MTB and adventure bikes. The 40 mm Presta valve suits most standard MTB rims and keeps weight and faff to a minimum. Quality you can trust from Impac by Schwalbe.

Specifications
Wheel Size – 29″ (BSD 622)
Tyre Width Range – 1.50–2.35″ (ETRTO 40–60-622)
Valve Type – Presta (FV) 40 mm, locknut & cap
Material – Butyl rubber
Compatibility – Rims drilled for Presta (≈6 mm valve hole)
Contents – Single inner tube

Fit Notes
Lightly inflate before fitting, check rim tape, and avoid pinches when seating beads. On deeper rims (>35–40 mm), consider a 60 mm valve version or a valve extender.

Impac by Schwalbe Tube — 27.5 × 2.0–2.35, Presta FV 40 mm

Built for modern 27.5″ (650B) trail and commuter tyres, this butyl tube covers the sweet spot from 2.0″ up to 2.35″. The 40 mm Presta valve is ideal for most standard rims.

Specifications
Wheel Size – 27.5″ / 650B (BSD 584)
Tyre Width Range – 2.00–2.35″ (ETRTO 50–60-584)
Valve Type – Presta (FV) 40 mm, locknut & cap
Material – Butyl rubber
Compatibility – Rims drilled for Presta (≈6 mm valve hole)
Contents – Single inner tube

Fit Notes
Partially inflate before installation, ensure rim tape fully covers spoke holes, and re-check seating all the way around. Using deeper rims (>35–40 mm)? Opt for a longer valve or extender. If your rim is Schrader-drilled (≈8 mm), use a reducer grommet or choose a Schrader tube.