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BRG Store
RENNEN ULTRALITE 22.2MM STEM 1"
Best for
Mini riders
Race class
Mini
Fit checked before shipping · Mechanic support via WhatsApp · Authorized dealer sourcing
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Live Stock
Inventory updated daily. Items in stock ship the next business day.
Fast Delivery
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Secure Payments
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Satisfaction Guarantee
Every item is checked before shipment. Return within 10 business days if unsatisfied.
Preorder terms
Clear timing before you commit.
09 Sep 2026 target
Full payment or WhatsApp-assisted
Cancelable before supplier confirmation
~14 business days after order
Fit & geometry
Will this fit me?
Race class
Mini
Rider height
Top tube
Check geometry/spec table before ordering
Wheel size
Material
Aluminum
Skill level
developing BMX racers
Setup context
Race-ready checks
Crank length
Gear ratio
Confirm chainring and cog setup
Brake type
Confirm brake standard
Pedal setup
Confirm included pedal/clipless preference
Track recommendation
Best for club racing and skill progression.
Next step
Still unsure?
Recommended upgrades
Complete the race setup
Gearing
Confirm chainring/cog ratio for your local track before checkout.
Contact points
Review pedals, grips, and saddle setup for gate-start confidence.
Protection
Pair the build with race helmet, gloves, and body protection.
Similar size alternatives
Compare before buying
Product info
About This Product
The Rennen Ultralite Stem is an engineering masterpiece. We set forth to develop the lightest mini stem in the world, but we did not stop there and made the stem adjustable. The adjustable feature is a interchangeable insert that allows for the stem to grow as your rider grows. Specs: 25mm option weighs a mere 40g making it the lightest mini stem in the world. The Rennen Ultralite Stem is availble in three sizes; 25mm, 27.5mm, 30mm. Additional inserts can be purchased seperately. The stem is made from 7075-T6 Aluminum and it is coupled with custom made 4mm 6AL-4V titanium screws. The custom 6AL-4V titanium screws feature a unique ball socket interface to ensure proper clamping at any angle. 80 lb Weight Limit - Due to the extreme weight reduction design we recommend that this product not be used for a child weighing greater than 80 lb.
+COMPLETE YOUR SETUP
THIS ITEM
RENNEN ULTRALITE 22.2MM STEM 1"
COMBINED TOTAL
Rp 12.725.718
Preorder each separately via WhatsApp for bundle deals
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RENNEN ULTRALITE 22.2MM STEM 1"
Rp 1.403.405