Zipp redesigns Service Course stems and seatposts

Improved stiffness-to-weight ratio and 1 1/4in steerer compatibility

Aerodynamic specialist Zipp, best known for its carbon wheels and boundary-pushing carbon components, also offers a popular high-value range of aluminium cockpit components called Service Course. For 2015, Zipp has updated its Service Course and Service Course SL stems and seatposts to offer increased compatibility and improved stiffness-to-weight ratios.


The biggest news is the new Zipp Service Course SL-OS stem. Much like Specialized’s Comp Multi stems, this features an internal shim that allows adjustment for +/- 4, 6 or 8-degree angles. Take the shim out and this stem is compatible with 1 1/4in steerer tubes, such as those found on Giant’s OD2 system.

Weight is claimed to be 140g for a 100mm length version. Available in lengths ranging from 70 to 130mm in 10mm increments, the Service Course SL-OS stem will sell for US$130 / £96 / AU$TBC and will be available in March.

The revised service course sl stem will be available in either +/- 6 or 17 degree options :
Courtesy (BikeRadar edit)

The Service Course SL stem will be available in either +/- 6 or 17 degree options

Featuring a small overhaul is the Service Course SL stem. For 2015 this receives a new shape that results in a claimed 125g weight (100mm) and improved stiffness. Available in either +/- 6 or 17 degree options with lengths ranging from 70 to 140mm (6 degree only), this model will be available from February. The retail price is US$110 / £88 / AU$TBC.

A redesigned seatpost offers a lower weight and easier tool access. the new head design is available in service course sl or service course levels, either 27.2mm or 31.6mm sizes and with either 0 or 20mm offsets:
Courtesy (BikeRadar edit)

On the left is the new Service Course SL seatpost, on the right is the new budget Service Course seatpost

A new Service Course SL seatpost drops a little weight and claims to provide easy tool access – although at 220g for a 0mm offset version, it’s still not superlight. Like the Service Course SL stem, the seatpost comes in a choice of high polish black with laser-etched graphics or an anodized black with black graphics.

Sitting as an entry-level option is an updated Service Course stem. A new shape – much like that of the new Service Course SL stem – claims to have improved the stiffness-to-weight ratio, with a claimed weight of 150g (100mm).

The budget service course stem recieves an update too. along with a standard 6 degree angle option, it will be available in a steep +/- 25 degree angle too :
Courtesy (BikeRadar edit)

The new Service Course stem will be available in a steep +/- 25 degree option

The interesting part of this new stem is the wide-range of sizes available. A +/- 6 degree stem will be available in sizes ranging from 60 to 130mm in 10mm increments. While a new +/- 25 degree stem will be available in 75, 90, 105 or 120mm lengths.

This new angled stem could be a popular choice for those seeking an ultra-aggressive position on either a road bike or 29er mountain bike, or as a way to get a far more upright riding position without moving to a more generic brand/look.


The new Service Course stem is expected to be available from February and will retail for US$55 / £44 / AU$TBC.