Shimano Ultegra Di2 FD-R8150 12S Front Derailleur

Description

More compact and faster than ever, the ULTEGRA R8150 front derailleur performs digitally precise front shifts under any circumstances.

Combining Shimano’s new Di2 platform and the road incarnation of HYPERGLIDE+, the ULTEGRA R8150 front derailleur shifts between chainrings with our fastest, most seamless action.

Product Features

Our fastest ever front shifting, 45% faster than FD-R9150
Smaller, sleeker, lighter
Frontal area reduced by 33%
Weight cut to 116 g
Top gear teeth capacity: 50-52T
2×12-speed IFDR8150F

Fitting Guide

FITTING AND ADJUSTING TIPS

SIZING

How to measure your foot length

Stand with the heel to a wall and put a measuring tape under your feet
Read off the measured foot length in millimeters before your longest toe
If you are between two sizes, choose the next higher, because feet are minimally greater under load

You can also use our template:
Download the foot measurement template

Birkenstock products are offered in European sizes. Please reference our Size and Width conversion charts below to determine your SA/UK size.

Your feet should be able to move freely without your toes hitting the edge of the footbed.

SIZING TABLE

Convert your SA/UK size

Fitting Guide – Birkenstock® South Africa

ADJUSTING

Before trying them on, put one hand under the toe and one under the heel, then flex the footbed a few times. This will initiate the break in period and will your help your new sandals feel comfy sooner.

Open all straps and step into the footbed. Close the straps comfortably, leaving enough space to allow your feet the freedom of movement. Exhale and enjoy.

WEARING

For the first five or six times you wear your new footwear, limit the time to just a few hours. This allows your feet and body to gradually get used to the contoured arch support as well as the straps and buckles.