Delta Stem Raiser Pro adjustable handlebar extender — 4.6" rise, T6 aluminum for 1 1/8" threadless bikes

Delta Stem Raiser Pro is an adjustable handlebar extender that raises bar height up to 4.6" to improve riding posture and comfort on 1 1/8" threadless forks.

Many riders—tall cyclists, commuters, and those who spend long hours in the saddle—find factory handlebar heights force a forward-leaning position that strains the back, neck and wrists. The Delta Stem Raiser Pro is a simple, reversible upgrade that repositions your handlebars upward without replacing the existing stem. Built from heat-treated T6 aluminum and designed in the US, it delivers a durable, precise fit for mountain, hybrid and road bikes with 1 1/8" (28.6 mm) threadless forks.

How much height can I add and how do I set it?

You can add up to 4.6 inches of handlebar height with a graduated, adjustable clamp system that locks at the desired position. The integrated height markers make small incremental adjustments straightforward so you can tune reach and posture on the fly.

• Maximum rise: up to 4.6" (measured from stock stem position)
• Integrated height markings for repeatable setup
• Adjustable and reversible installation — no permanent modifications
• Fastened with standard hex hardware compatible with common bike tools

Will it fit my bike and change handling?

Delta designed this riser for bikes using a 1 1/8" (28.6 mm) threadless steerer tube—typical on many modern road, hybrid and mountain bicycles. Raising the bars shifts rider weight slightly rearward and upright; most riders notice improved comfort and a more relaxed riding position without aggressive handling changes when installed within manufacturer-recommended limits.

• Compatibility: 1 1/8" (28.6 mm) threadless forks only
• Suitable for road, hybrid, and MTB stems with exposed steerer tubes
• Designed to preserve headset preload and alignment when installed properly
• Not a replacement for steering components—follow torque specs and bike shop guidance

What is it made of and will it last outdoors?

The Stem Raiser Pro is machined from premium T6 heat-treated aluminum for an excellent strength-to-weight ratio and corrosion resistance. The finish and hardware are chosen to withstand weather and daily use; proper installation and routine checks keep the assembly safe and long-lasting.

• T6 aluminum construction for strength and durability
• Precision machining for secure clamping and alignment
• Corrosion-resistant finish suited for regular outdoor riding
• Designed and engineered in the US with quality control standards

How easy is the install and what support is offered?

Installation is straightforward for riders comfortable with basic bike maintenance and standard hex tools. If you prefer, a local bike shop can fit it quickly; Delta provides US-based customer support for questions about fitment or setup.

• Typical install time: 15–30 minutes for experienced home mechanics
• Uses familiar hex bolts and common bike tools
• Reversible—return to original stem height without damage
• US-based customer support available for fit or installation questions

Who is this for? The Delta Stem Raiser Pro is aimed at riders who want a more upright, comfortable position without buying a new stem or bike—tall cyclists, commuters, recreational riders, and anyone experiencing stiffness from prolonged rides. If your bike uses a 1 1/8" threadless steerer and you want an adjustable, durable, and reversible solution to raise bar height, this riser offers a practical upgrade engineered for everyday use.