Zipp Service Course SL Stem (+/-17°) (Black/Gray) (70mm)
This product was added to our catalog on August 21, 2015.This is the Zipp Service Course SL Stem, with a +/-17° rise. Your stem has to resist flexing during sprints and accelerations, clamp securely to the fork and handlebar, and support your weight over significant impacts. It’s a difficult job, but the Service Course SL stem is still able to combine strength, stiffness and reliability at a weight of only 120 grams (100mm). The Service Course SL has high-strength, 3D-forged construction, 7075 series aluminum and titanium bolts to deliver an exceptional strength-to-weight ratio while allowing for smooth lines to complement the aesthetics of modern frames.
The Service Course SL stem is available in seven lengths (70mm to 130mm in 10mm increments in 17°) to meet any rider’s fitting needs. The stainless steel bolts have been replaced with titanium and use TORX® heads on all bolts for precision torque readings and ease of adjustment. Every piece in the Service Course SL line is available in the standard gloss black with white logos, as well as the "Beyond Black" black color scheme with black laser-etched black logos for a stealthy look.Torx®-Head Bolts:
Zipp chooses Torx®-head bolts for its stems and aero bars - why? 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. Zipp chose a bolt size that was best suited for Zipp stems; T25. The standard Torx tool head for an M5 bolt is a T25. The T25 is becoming a go-to bolt in the bicycle industry. 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. 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 wrench, which is needed to achieve the precise torque reading for proper installation. It’s simply a better bolt:
- Won’t easily strip.
- Provides more accurate torque readings.
- More durable.
Weight (100mm): 130g
Clamp Diameter: 31.8mm
Steer tube diameter: 11/8in
Stack height: 42mm
Clamp width: 40mm
Clamp torque - max: 4Nm