Aluminium Alloy Head Up Stem Extender

Engineered from forged aluminium alloy, this head-up stem extender combines strength, light weight and lasting corrosion resistance—designed for repeated assembly and disassembly without wear or deformation. It features five 10mm gaskets, supporting cumulative height increases of up to 100mm. Height is fully adjustable via spacer selection, enabling personalised fit that reduces physical stress on the waist, upper back, neck and wrists. Simple installation connects directly to standard 1-1/8 inch (28.6mm) threadless steerer tubes. Verified to work with mountain bikes, road bikes and MTBs widely available in the UK and EU markets.