Zipp Service Course SL Stem

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Product Description

Zipp first developed the Service Course SL stem for the fit and performance needs of pros. That goal of being pro grade has proven out over the past several seasons as the stem became a mainstay in the pro peloton and cyclocross circuit being ridden to victory in Paris-Roubaix and the Vuelta a España. Now, we take that pro-proven legacy and build on it with the redesigned Service Course SL stem.

The Service Course SL Stem, crafted from 7075 aluminum, features a redesigned shape that’s strong and lightweight, resulting in a best-in-class 1.85 grams per newton meter of stiffness. That results in no-flex sprints and accelerations. To meet every rider’s fit needs, the stem is available in ±6° and ±17° angles and seven lengths from 70 to 130mm as well as a 140mm length for the ±6° stem only.

Features titanium hardware with TORX® heads on all bolts for precision torque readings and ease of adjustment. (More information below.)

Available in two color schemes: High-polished Black with Silver Laser-Etched Graphics or Beyond Black anodized with black logos.

Zipp chooses Torx®-head bolts for its stems and aero bars - why? It’s simply a better bolt:

  • Won’t easily strip.
  • give more accurate torque readers.
  • Are durable.

It comes down to the way the tool head interacts with the bolt. Common hex tools tend to strip the bolt head if the bolt is over torqued. This is especially true with lightweight bolts. Zipp wanted to be able to use a lightweight bolt with reliable performance. Bolts on stems and aero bars are critical to safety – having a reliable bolt is crucial.

The Torx® head is more robust that hex-head bolts and will not easily strip. Torx® fasteners also were designed for use with a torque-limiting wrench (torque wrench), which is needed to achieve the precise torque reading for proper installation.

We chose a bolt size – T25 – for that was best suited for our stems. The standard Torx tool head for an M5 bolt is a T25, although sometimes a T20 or T27 is used. The T25 is becoming a go-to bolt in the bicycle industry. It’s been used on disc brakes for years and also is in use on chainring bolts, derailleurs and shifters. What’s more, the T25 tool is a common in bike shops or hardware stores and is readily available alone or in multi-tool sets. For your convenience, Zipp includes a T25 wrench with all stems and aero bars.


Weight (100mm)

125g

Sizes

70,80,90,100,110,120,130 and 140mm (6° only)

Material

7075 Aluminum

Hardware

Titanium with Torx® T25 heads

Clamp Diameter

31.8mm

Angle

±6° or ±17°

Steer tube diameter

1-1/8in

Stack height

41mm

Clamp width

47mm

Clamp torque - max

5Nm

Occasionally, without notice, manufacturers change product design and/or specifications.

Stems Guide

What are stems?

The stem is the component that attaches your handlebar to your fork steerer. It has a clamp at either end, at 90 degrees to each other.

Who needs a stem?

Stems rarely need to be changed due to damage, but you might decide on an upgrade to save weight or to change your reach on your bike.

What are the choices?

Although your choice will partly be based on getting the right clamp size for your handlebars, you will also need to decide what length stem you want. Longer stems will increase your reach, while a shorter stem will decrease it and can sharpen up your bike’s handling.

What should I buy with them?

Many people will choose to upgrade their handlebar along with their stem, for compatibility or to get a pleasing matching set.

Anything else?

It’s crucial that you check the clamps at both ends of your stem are compatible – you need one for the right size headset and the right handlebar width.

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

tnt delivery

Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.