WAKE MTB Stem 31.8mm 45° Riser Stem 90mm — AL6061 Lightweight, 4-Bolt Clamp

WAKE's 45° 31.8mm aluminum MTB stem is a compact, lightweight riser that shortens reach and raises handlebars for improved control across mountain, road, fixie, and BMX bikes.

This 90mm stem is machined from AL6061-T6 aluminum to deliver a balance of strength and low weight (approximately 230g), with a hollowed profile and a four-bolt clamp that secures a 31.8mm handlebar while fitting a 28.6mm steerer tube. It’s designed as a universal short stem replacement to alter cockpit geometry quickly and simply—no exotic tools or frame mods required.

How will swapping to this 45° stem change my riding position?

Changing to a 45° riser stem both raises the handlebars and shortens the horizontal reach, which moves your weight rearward and lightens the front end. Riders commonly notice improved comfort, easier technical handling, and reduced strain on the lower back and wrists when dialing in cockpit fit.

• Raises bars and reduces forward reach for a more upright stance.
• 45° angle gives significant lift without extreme geometry changes.
• 90mm length maintains compact cockpit proportions.
• Suitable for small adjustments or larger fit corrections.

Will this stem fit my bike and handlebars?

The WAKE stem fits handlebars with a 31.8mm clamp diameter and forks with a 28.6mm (1-1/8") steerer tube—these are very common sizes on modern MTBs, road bikes, fixies and many hybrids. Confirm your current measurements before purchase to ensure compatibility.

• Handlebar clamp: 31.8mm (1-1/4").
• Steerer tube compatibility: 28.6mm (1-1/8").
• Length: 90mm; weight: ~230g.
• Four-bolt faceplate for secure clamping of the bar.

Is installation straightforward and what tools are needed?

Yes—installation is a simple replacement of your existing stem: remove the old stem, position the WAKE stem on the steerer, align the handlebars, and tighten the bolts to the correct torque. The four-bolt clamp design makes alignment precise and repeatable when reassembling the cockpit.

• Typical tools: hex keys/Allen set and a torque wrench recommended.
• Follow bolt torque specs for safe clamping and to avoid over-tightening.
• Compatible with standard threadless forks—no cutting or special adapters needed.
• Hollowed design reduces weight while keeping the clamping area strong.

How durable is the stem and what materials are used?

The stem is crafted from AL6061-T6 aluminum, a common bicycle alloy known for good strength-to-weight properties and corrosion resistance. Its hollow architecture reduces mass while the four-bolt faceplate spreads clamping forces for a secure, long-term hold.

• Material: AL6061-T6 aluminum, finished in black anodized appearance.
• Hollow construction reduces weight to ~230g without sacrificing stiffness.
• Four-bolt clamp minimizes bar slip under heavy braking or sprinting.
• Designed for everyday riding loads on MTB, road, fixie, BMX, and hybrid bikes.

Who is this for? The WAKE 45° 31.8mm 90mm stem is aimed at cyclists who want a simple, effective way to raise their handlebars and shorten reach—mountain bikers dialing in handling, commuters seeking more upright comfort, and fixed-gear or BMX riders who prefer a compact cockpit. If your bike uses common 31.8mm bars and a 28.6mm steerer tube and you want a durable aluminum stem that’s easy to fit, this model is a practical, budget-friendly choice.