We may get paid by partner for deals, including promoted items

Sponsored

OpticsPlanet use Code: GEARCHASE Amazon - Lightning Deals Amazon - Hunting Deals Bike Racks Heated Clothing Stio Hoka Fishing Mountain Hardwear

FSA K-Force OS-99 CSI Stem Black 31.8 Mm X 130 Mm X +/-6 Degree by Fsa -

Product Description

3D-forged and CNC-machined from AL2014, then permanently bonded with a UD carbon wrap, the FSA K-Force OS-99 CSI stem is a true hybrid, offering many benefits of both aluminum and carbon.

FSA K-Force OS-99 CSI Stem Black 31.8 Mm X 130 Mm X +/-6 Degree

at REI.com

Browse all REI.com deals

$215.00

In Stock at REI.com

Price verified today

Buy Now at REI.com

Secure checkout Easy returns

or compare prices

Product Details

Brand Fsa

Color Black

Size 31.8 MM X 130 MM X +/-6 Degree

MPN 175-0321BKG

Shop more FSA Components

All 597 in-stock FSA Components from 17 stores →

More from Fsa

Last Updated:

Oct 30, 2026 03:28 AM

FSA Omega Stem Black 31.8 Mm X 100 Mm X +/-6 Degree

FSA Omega Stem Black 31.8 Mm X 100 Mm X +/-6 Degree View Details

$40.00

Buy Now · $40.00

Last Updated:

Oct 30, 2026 03:28 AM

FSA Gossamer Bike Stem Black 31.8 Mm X 80Mm X +/-6 Degree

FSA Gossamer Bike Stem Black 31.8 Mm X 80Mm X +/-6 Degree View Details

$73.00

Buy Now · $73.00

Last Updated:

Oct 30, 2026 03:28 AM

FSA Gradient Stem Black 35 Mm X 33 Mm X +/-6 Degree

FSA Gradient Stem Black 35 Mm X 33 Mm X +/-6 Degree View Details

$114.00

Buy Now · $114.00

Last Updated:

Oct 30, 2026 03:28 AM

FSA VAS Stem Black 31.8 Mm X 100 Mm X +/-6 Degree

FSA VAS Stem Black 31.8 Mm X 100 Mm X +/-6 Degree View Details

$128.00

Buy Now · $128.00

Last Updated:

Oct 30, 2026 03:28 AM

FSA NS ACR Bike Stem Black 31.8 Mm X 70 Mm X +/-6 Degree

FSA NS ACR Bike Stem Black 31.8 Mm X 70 Mm X +/-6 Degree View Details

$143.00

Buy Now · $143.00

Last Updated:

Oct 30, 2026 03:28 AM

FSA KFX Stem Black 31.8 Mm X 110 Mm X +/-12 Degre

FSA KFX Stem Black 31.8 Mm X 110 Mm X +/-12 Degre View Details

$188.00

Buy Now · $188.00