About The Bontrager Pro 100mm 17° 31.8mm Black Stem
The Bontrager Pro Blendr Stem is a 100mm, 17° rise forged alloy stem with a 31.8mm bar clamp for road and mountain bikes. The 17° rise suits a higher, more upright bar position.
Forged construction keeps it stiff and light, and a 4-bolt dual band clamp holds the handlebar securely. A Blendr Pro base and Blendr XXX accessory mounts are included, and the stem is approved for carbon bars and carbon steerer tubes.
Who It's For
- Road or mountain riders with a 31.8mm-clamp handlebar who want a 100mm, 17° stem.
- Riders mounting a light, computer or camera who want a clean Blendr setup.
- Riders with a 35mm bar should look elsewhere; this stem fits 31.8mm bars only.
What to Look For
- Bar clamp: 31.8mm. Confirm your handlebar's clamp diameter.
- Length and rise: 100mm at 17°. Both change reach and bar height, so set them at a fit.
- Accessories: included mounts are intended for Ion and Trip, Garmin, GoPro and SRM accessories.
Key Features
Forged alloy. Forged construction delivers stiffness at a light weight.
4-bolt bar clamp. Dual band faceplate with M5 corrosion-resistant bolts, 5.2Nm torque spec.
Carbon approved. Approved for use with carbon handlebars and carbon steerer tubes.
Blendr integration. Blendr Pro base and Blendr XXX accessory mounts included for Ion and Trip, Garmin, GoPro and SRM accessories.
Finish. Black.
Rider Intent Summary
- Biggest strengths: Stiff forged alloy, secure 4-bolt clamp, Blendr mounts in the box.
- Tradeoffs: 31.8mm clamp only; Blendr mounts favor the listed accessory brands.
- What makes it different: Integrated accessory mounting with carbon bar and steerer approval.
Victory's Take
At Victory Bicycle Studio we use the 17° rise to recover bar height without adding spacers, and we check that 100mm keeps your reach where we set it at the fit.
Specifications
- Brand: Bontrager
- Model: Pro Blendr
- Length: 100mm
- Rise: 17°
- Bar clamp: 31.8mm
- Material: Forged alloy
- Color: Black
- Faceplate: 4-bolt dual band, M5 bolts
- Torque: 5.2Nm (faceplate bolts)
- Compatibility: Carbon bars and steerer tubes; Blendr Pro base and Blendr XXX mounts included
- Part number: 5344875
What you get

Bontrager Pro 100mm 17° 31.8mm Black Stem
Frequently Asked Questions
Do you offer free shipping?
We do offer free shipping on non-bike orders over $100. We do not offer free shipping for bicycles unless it is a one time promotion. Generally, bike shipping will cost $150 and that covers just the shipping of the bike with no assembly. If you were to bring that bike to your local mechanic or bike store, you would pay them their assembly fee. If you choose our Professional Assembly option for $200, our service technicians would assemble the bike before shipping and then re-pack the bike safely for transit. When you receive the bike you would attach the front wheel, attach the seatpost/saddle, and raise the handlebars and clamp them. Those three items do have to be detached to minimize or eliminate the chance of damage in transit.
How much does shipping cost?
For orders of parts, accessories, apparel, etc. on orders under $100, shipping is a flat rate of $9.99. Regular bike shipping without assembly is $150, bike shipping with Professional Assembly is an additional $200 (so $350 in total which includes the $150 of regular shipping). Our White Glove Delivery option is $699 and that will cover the assembly of the bike and our White Glove Delivery partner delivering your dream bike to your front door, ready to ride!
How can I track my order?
When you place your online order, you will receive an instantaneous email update with your order number and order details, and shortly after, you will receive a follow up order email with the tracking number for your order. If you still need assistance with your order, feel free to email us at online@victorybicyclestudio.com and we will respond asap.