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Profile Helm Stem 31.8mm

Marsoni M251S
Sale price$162.95
Pay 4 payments of $40.74 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Profile Helm Stem 31.8mmThe new Profile Helm is an oversized stem for the 31. 8mm bars we are seeing more and more of on the race scene The stack height is 20mm with 0 degree rise and features moto clamp front bolts (top two bolts fully tighten, bottom bolts to adjust clamp pressure). Made from fully CNC machined, 7075 billet aluminum, the stem body machined with radius and chamfered edges for a smooth finish and features anodized colors with laser etched graphics. Sizes:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.3 ★★★★★
Based on 1737 reviews
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Product Reviews
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Verified Purchase
Pamela Smith
Phoenix, US
★★★★★ 3
Plugs
Color: Grey
The plugs didn’t work it leaked. Needed to buy bigger plugs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
J
Verified Purchase
Johnathan Scott
Alexandria, US
★★★★★ 4
ALMOST perfect.
Color: Vivid Orange
Item is as advertised. Durable, and the tools are useful for more than just regular plugs. It comes with the snips which was great as well as actual valve stem replacements which I thought were pretty nice. Only complaint are the plug strips themselves. If the hole is from a bolt or something larger than the average screw, it may take two of them to completely stop the leak. Hope this helped.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
S
Verified Purchase
Sean Custer
Bozeman, US
★★★★★ 5
Great little kit great price
Color: Vivid Orange1, Size: 16pcs
Excellent product worked fantastic very easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
G
Verified Purchase
Glassy Raven
Pawtucket, US
★★★★★ 5
Sturdy, high-quality components
Color: Vivid Orange1, Size: 16pcs
Well-made reamer and plug inserter, as well as the 10 plugs, and the accessories. Even the pouch is high quality. Included instructions are very clear -- just be sure not to insert the plug with too much force, or you'll put the entire plug thru the hole. It's so much easier for a simple in-situ scooter tire puncture repair, where removing the tire can be much more time-consuming than removing a car tire. Including the high-quality little water/soap solution mister is a thoughtful feature. I highly recommend.
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Reviewed in the United States on May 30, 2026
R
Verified Purchase
Robert
Grantham, US
★★★★★ 5
Great quality kit
Color: Vivid Orange1, Size: 16pcs
Excellent quality tire repair kit, works very well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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