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Black Market Bikes Underboss Stem

Average User Rating: (Good)
Black Market Bikes Underboss  Stem IMG_2883 copy
C70_91414620_1287686557 C70_89189040_1287686576 C70_91239620_1287686596 C70_87538170_1287686617

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“Sweet Stem!!”

The Good: Rise and Length are spot on! Graphics are legit!

The Bad: The bolts are weak, damaged 2 of them in a nasty crash!

Overall Review:

The Blk Mrkt Underboss Stem is a good stem for it's price, maybe not the lightest nor the best, but it's good looking and cheap! Will do the job if your not a weight weenie and if you're on a budget!

“So-so stem”

The Good: Looks pretty amazing in polished colour, kind of light.

The Bad: Tiny hardware, slips like crazy, bolts strip instantly, friend of mine had the threads just rip out of the stem body.

Overall Review: I'd be hard pressed to recommend this stem by any metric, there are lighter, cheaper, better-looking, better-performing stems out there.


Riding Type Cross Country, Trail, Freeride, Downhill, Dirt Jump / Urban, Other
Material Full CNC'D 6061 T6 Al. Body W/ 4mm Bolts. Massive Internally Machined Cavity For Weight Savings.
Clamp Size 31.8mm or 25.4mm ( 22.2mm coming in 2011)
Length 50mm
Rise Zero or 5mm Drop When Inverted
Steer Diameter 1 1/8"
Colors Black, Blue, Gold, Purple, Red and White

0 lb 6.7 oz (190 g)

Miscellaneous 6.7 oz. /190 g. (25.4mm) or 7.5 oz./ 213 g. (31.8mm)
Price $64.99
More Info Black Market Bikes website