Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®
Box One Oversized 31.8 x 1-1/8" Top Load Stem - Box®

Box One Oversized 31.8 x 1-1/8" Top Load Stem

$69.99 Sale Save
1 review
Size 48mm
Color Black

Only 0 left in stock

SKUBX-ST1831T48-BK

All Box stems are engineered and crafted using our Oversized Technology. As we follow the load paths down the handlebars we have focused our attention on the stem-to-bar interface. Since the Oversized handlebars have an increased wall thickness and tube diameter in this sector we have reciprocated with an augmented stem interface with greater surface area. We’ve done this by moving material from low stress areas. This has greatly minimized twist and contributed to responsiveness. As the stem in mated with the handlebars we have contributed to increased pedaling stiffness by providing a backstop to the “lifting” phenomenon. There is no point pushing hard on your pedals if you can’t pull up on your handlebars and deliver that power. Power can easily be lost to handlebar-to-stem deflection and the consequences can be poor power delivery and steering control. When combined with Box’s other Oversized components, you’ll experience heightened responsiveness and reduced latency.

Key differences: In this particular model stem we’ve tailored the Oversized strategy to favor utility and access. The geometry has been altered to allow for easy handlebar removal while at the same time scavenging material from low stress zones. Ideal for those who don’t want to compromise on user experience to gain performance. These stems are engineered for the larger-sized racers.

Oversized Stiff Design
Oversized Bar Bore
Oversized Cro-Mo Clamping Bolts
Top-Load Clamp Design
Cold Forged for Superior Strength

Box One XL Fork with 1-1/8" Steerer Tube
Box One X2 Fork with 1-1/8" Steerer Tube
Box One X5 Fork with 1-1/8" Steerer Tube
Box One Cro-mo Triple Taper Handlebar with 31.8" Bar Bore
Box One Alloy Triple Taper Handlebar with 31.8" Bar Bore

48mm 53mm 60mm
Clamp (Ø) 31.8mm
Material 6061-T6 Aluminum
Process Cold-Forged
Rise +/-5˚
Stack Height 28mm
Steerer Tube 1-1/8"
Weight (+/-) 263 grams / 9.3 ounces 267 grams / 9.4 ounces 280 grams / 9.9 ounces

Will handlebars with a 22.2Ø stem clamp area fit this stem?
No, stem will only fit 31.8Ø oversize handlebars

Customer Reviews
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Filter Reviews:
DH
04/03/2022
Daniel H.
United States

Super solid. Needs stainless hardware

I love the feel of this stem, it feels super-connected and solid, but I live in the Pacific NW, and the hardware rusted in about two months (I park my bikes under a carport). Now upgrading the hardware to stainless or Ti will cost as much as a cheap stem.