Available exclusively for the Factor ONE, the ONE Integrated Barstem empowers modern rider positions without requiring unsafe setups that over-leverage the front end by decoupling the hand position from the stem length.

The Factor ONE Integrated Barstem’s stack and reach are affected by the combination of forward and upward sweep of the handlebar, which effectively puts the riders hands in the same location as a conventional bar setup, while reducing the lever length to the shifters.

The bars are designed to mimic the AB02 at the hand position of the rider. All other dimensions such as backsweep, drop depth, bar reach are identical. Simulating the combined stack of the handlebars, dust cover, compression ring, and -6 degree “stem”, the ONE Integrated Barstem puts the handlebar in the identical plane as the equivalent stack OSTRO VAM, simplifying fitting. This is an aggressive, racy fit that nicely serves both fast amateurs and professionals.

Sizes are designated 1, 2, 3, 4, 5, corresponding to stem equivalents of 110 through 150 mm with three high rise options offering an additional 20mm of stack. Up to 15 mm of spacers can be added per bike. When combined with the selection of the three options of high- and low-rise bars, this gives riders 35 mm of shifter stack height range.

CHOOSING YOUR ONE HANDLEBAR
Selecting the right fit for your new Factor ONE is simple. We've designed a new system that removes traditional stem lengths to give you a clean, integrated setup.

A Simple Guide to Your Fit
The easiest way to find your size is to match it to your current OSTRO VAM or OSTRO Gravel setup. Here’s how:

Frame: Choose the same frame size you normally ride.

Seatpost: Select the ONE Setback seatpost (this replaces the OSTRO Zero Setback post).

Stem: Pick the stem number that matches the stem length you use on an OSTRO: 110mm = 1, 120mm = 2, 130mm = 3, 140mm = 4, 150mm = 5. The 20mm longer reach of the ONE is already factored into this calculation.

Handlebar Options
Low Bar: Our standard, aggressive-position bar. Available in sizes: 1, 2, 3, 4, 5.

High Bar: This option directly mimics the hand position of an OSTRO VAM using a 20mm rise in the bars curvature. It is available in sizes 1, 2, and 3 only: 1H, 2H, 3H

Both Low and High handlebar styles can be adjusted with up to 15mm of spacers.