Rockrider MTB Tyres

Getting the Size Right: Standards and Clearance

Before anything else, check your ETRTO number - it's the two-figure code printed on your current tyre sidewall, like 57-622 for a 29 x 2.25. The first number is the tyre width in millimetres; the second is the bead seat diameter. A 622 is a 29-inch wheel; a 584 is 27.5. Don't mix them up. Sounds obvious, but it's worth double-checking before you order.

Width is where things get interesting. Running a 2.4-inch-plus tyre on a trail bike gives you a bigger contact patch and more casing volume, which helps absorb trail chatter - but your frame and fork need enough clearance to allow it. Most modern 29er trail frames will clear a 2.4 without drama, but older XC geometry bikes can be tight, especially at the chainstays. Measure the gap with your current tyre fitted, or check the manufacturer's stated max width. A tyre that rubs isn't just annoying; it's a safety issue.

If you're going tubeless - and on UK trails, you probably should - the setup demands a bit more attention. Your rims need to be Tubeless Ready (TLR) compatible, meaning they have a sealed bead channel. You'll also need airtight rim tape, tubeless valves, and a decent volume of sealant. The Rockrider mountain bike range ships with TLR-compatible rims from the ST 520 upwards, so if you're already on one of those builds, you're most of the way there. The bead on Rockrider's TLR tyres seats reliably with a track pump - no compressor drama for most riders.

Which Rockrider Tyre for Which Riding?

Rockrider organises their tyre range around three clear use cases, and it's a sensible split. Dry-condition tyres run low-profile, tightly packed knobs - fast rolling resistance, efficient on hardpack and summer singletrack, good on gravel fire roads. They're not what you want on a greasy November morning in the Peaks, but for summer racing or fast XC loops they're properly quick. Rolling resistance is noticeably lower than a full-on trail tyre; you feel it on the climbs.

All-conditions variants are the workhorse of the range. Medium-height, ramped centre knobs keep things rolling efficiently, while taller shoulder knobs bite when you tip into a corner. These are the tyres that make sense for most UK riders most of the year - versatile enough to handle a wet Wednesday evening ride and still feel composed on drier weekend trails. The dual compound versions are worth the step up in price: harder rubber through the centre cuts rolling resistance, softer rubber on the shoulders digs in when you lean the bike over. You notice the difference in loose corners.

Mud tyres run tall, widely spaced spikes specifically designed to self-clean - packed mud gets thrown clear rather than clogging the tread. If you're riding Scottish trails in January or churning through Glentress in a wet autumn, this is what you need. They're slower on firm ground, but that's the trade-off. Pair them with a faster-rolling front if you want to split the difference.

On the construction side, wire bead tyres are heavier and less supple than folding bead equivalents, but they're a solid choice if budget is the priority and you're running inner tubes. Step up to a folding bead TLR tyre with a Grip+ compound and higher TPI casing, and you get a more flexible, conforming casing that follows the ground better - think of it as the difference between a stiff shoe and one that actually bends with your foot. The Protect+ puncture protection layer sits sub-tread and reinforces the sidewalls, which matters more than people realise on flint-heavy trails. If you're comparing with Maxxis or Continental at similar price points, Rockrider holds its own on casing quality, particularly in the mid-tier TLR options.

Surviving UK Conditions: Pressure, Wear, and Sealant

UK trails are hard on tyres. Flinty chalk paths in the South Downs, exposed gritstone on the Peak District moors, wet roots on every bridleway between October and April - the Protect+ casing earns its keep here. Reinforced sidewalls resist slash damage from sharp rocks; the sub-tread layer adds a buffer against pinch flats when you clip a hidden root edge. It's not indestructible, but it's meaningfully more robust than a standard cross-country casing.

Tyre pressure makes a bigger difference than most riders give it credit for. Drop too low and you risk burping sealant or rolling the tyre off the rim mid-corner. Run too hard and you lose the grip advantage of a softer compound - the tyre skims across wet roots rather than wrapping around them. For tubeless setups on UK trails, 20 - 25 PSI front and rear is a reasonable starting point for a rider around 75 - 80kg. Go a few PSI higher if you're heavier or riding particularly rocky ground; go a little lower up front if grip is the priority. A lightweight XC setup might run higher - closer to 28 - 30 PSI - where rolling speed matters more than maximum traction.

Sealant dries out. It's easy to forget this, especially through summer when you're not getting many flats. Check your sealant volume every two to three months - more frequently in winter when temperature fluctuations accelerate drying. Top up if you can hear it sloshing but the volume feels low; if it's gone fully solid, strip the tyre, clean the bead, and start again. Catching a cracked sidewall early saves you a walk out. Run your thumb around the casing after every few rides - you'll feel a bulge or soft spot well before it becomes a trailside problem. Pair your tyres with a decent set of Rockrider helmets and MTB shorts if you're kitting out for the season - the tyre is only part of the picture. For riders wanting to compare rubber from other respected names, Michelin MTB tyres are worth a look at a similar price tier.