FSA OS99 Bike Stem Black Ø31.8 x 80 90 100 110 120 130mm Carbon +- 6 degree

by FSA

Product Features

• Forged and CNC-machined AL7050/T6
• 4-bolt sculpted faceplate; 6/4 Titanium hardware
• Finish: Gloss carbon 3K weave with flip-flop graphics
• For 31.8mm handlebars and 1-1/8" steerer tube, 35 mm stack heigh
• + / - 6 degree rise (reversible).

Product Description

The FSA OS-99 CSI Stem is a forged and CNC'd aluminum stem wrapped in carbon for extra stiffness. The aluminum base is AL7050. A gloss carbon is wrapped on top of the aluminum. There is a four-bolt sculpted face clamp. The clamp is anodized black. The four faceplate bolts and two steerer pinch bolts are made from titanium. The stack height of the stem is 35mm. The stem angle is plus or minus (+/-) 6 degrees aka 84/96-degrees. The stem comes in 80-130mm lengths in 10mm increments. The finish is gloss 3K weave. Weight is 118g.

Brand: FSA
Model: OS99
Size:
Color: Black Ø31.8 mm
Material:
Included in Box:
Stem x 1
Warranty:
Weight:
250 grams (0.51 Lbs or 8.82 ounces)
Specifications:

Product Details

• Item Weight: 8.8 ounces
• Shipping Weight: 11 ounces (View shipping rates and policies)
• ASIN: B0014FQOWI
• Average Customer Review: 5.0 out of 5 stars  See all reviews (2 customer reviews)
• Amazon Best Sellers Rank: #55,514 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • #58 in Sports & Outdoors > Bikes & Accessories > Components & Parts > Stems

Customer Reviews

Most Helpful Customer Reviews

5.0 out of 5 stars looks so good!, June 13, 2011

By 

JR (Sacramento, CA USA) - See all my reviews

This review is from: FSA OS99 Bike Stem Black Ø31.8 x 80 90 100 110 120 130mm Carbon +- 6 degree (Misc.)

The stem I had was just a little too long at 110 so i decided to purchase another one. I wanted to go with an fsa since the stem I had was an fsa. When I got the stem it looked unbelievable. The carbon wrap was clean and shiny. The graphics looked cool and screamed, "look at me!" So other then aesthetics the function of the carbon wrap is to help absorb a lot of the vibration so that's a plus. Also, it is plenty stiff and stronger because it is still aluminum underneath. The only downside (and to me I don't consider this a downfall) is that it weighs more than my previous stem. Only by a little because the added weight is the carbon fiber.

5.0 out of 5 stars Beautiful Stem, July 4, 2009

By 

Rufus Littlefield (Seattle, WA USA) - See all my reviews
(REAL NAME)   

I bought this stem as a replacement for an FSA OS-115 stem (aluminum stem with carbon face plate). I bought it for three reasons:

1) I have an FSA K-wing carbon handlebar and wanted a stem to match
2) I needed a stem with a flatter angle (the old one was 78/102)
3) I had a $50 coupon for Amazon and had to buy SOMETHING for the bike :)

PROS: This stem is beautiful - shiny carbon weave and reversible logo looks absolutely AWESOME, especially with an FSA carbon handlebar. Also, since it's an aluminum stem wrapped in carbon, I have no doubt about its durability. I'm 6'8" and 240lbs, so I need a stem I can rely on.

CONS: Although I don't have a scale to weigh it on, I can tell by holding them that the CSI OS-99 it is heavier than the OS-115 (aluminum) stem. I'm not concerned if I add a few grams so I really don't care if it's a little heavier, but some of you may want to look elsewhere if saving weight is one of your main objectives.

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