YunSCM 26 × 4.0 Fat Bike Tyres (98-559) – Heavy Duty Pair

YunSCM 26 × 4.0 Heavy Duty Fat Bike Tyres

This pair of YunSCM 26 × 4.0 heavy duty fat bike tyres is marked ETRTO 98-559 for compatible 559mm bead-seat rims. The foldable tyres have a directional block tread for compatible fat bicycles and e-bikes used on everyday roads and light off-road surfaces.

Supplied as two tyres only. Inner tubes, wheels and rims are not included.

Key features

• Pair of replacement 26 × 4.0 fat bicycle tyres.
• Directional block tread for mixed everyday surfaces.
• Heavy duty rubber construction.
• Foldable design for storage and transport.

Specifications

Will these 26 × 4.0 tyres fit my e-bike?

Match the markings on your existing tyre and confirm that your rim width, frame and fork provide suitable clearance. These tyres are marked 98-559 (26 × 4.0); do not choose a replacement using wheel diameter alone. Compatibility depends on your wheel and bike setup, rather than the bike brand.

If you are replacing a tyre with different width markings, contact us with photos of the existing tyre size and wheel before ordering. Use appropriately sized inner tubes and check the rim tape when fitting.

Fitting and care

Allow the tyres to regain their shape after unpacking. Inspect the beads and casing before installation, avoid sharply bending or kinking the beads, and check that the rim is free from sharp edges. Seat each tyre evenly and follow any rotation arrow on the sidewall.

Follow the pressure and load limits marked on the tyre and rim, together with your bike's requirements. Check tyre pressure and condition regularly. If you are unsure about fitting, ask a qualified cycle mechanic.

Explore more bicycle tyres and inner tubes or ask our London team about fitting.