Q: Any company can buy wind tunnel time. What makes Bontrager different?

A: When combined with Steve Hed, we have more than thirty years combined experience in testing at the wind tunnel, so not only do we know how to interpret the hard data but we also know how to set up the wheel, bike and rider to most closely mimic what really happens on the road. In short, we have nearly twice the experience in the tunnel than our closest competitor.

Q: Why is the carbon structure rigid on the ACC 5.0 wheels?

A: We opted to use Rohl-a-cell foam cores in the rims of the 5.0ACC because it offered us the best combination of stiffness, strength and lightweight than any other material.

Q: Why do you only offer Shimano style wheels?

A: While the wheels are offered with Shimano freehub bodies, your dealer can easily get a Campagnolo freehub through Bontrager. Swapping the freehub is not any more difficult than pulling one off and pushing the replacememt onto the axle.

Q: What are the weight limits of Bontrager Road Wheels?

A: Despite their light weight and low spoke count, Bontrager wheels do not have a published weight restriction. Regardless of intended use or rider weight, all of our wheel systems must pass the same durability and impact test standards. Keep in mind, though, that every rider is different, and every rider has unique needs and preferences. That’s why Bontrager presents one of the largest wheel offerings in the world.

Q: Is there a maximum inflation pressure for tires on Bontrager carbon rims?

A: The maximum inflation pressure on carbon road clincher wheels is 120 psi (8.3 atm). Over-inflation may damage the rim and/or blow the tire off of the rim. Though we do not have a maximum suggested inflation for our carbon tubular wheels, we suggest you check with the tire manufacturer for the tire’s maximum rated inflation. The Maximum inflation pressure on carbon mountain clincher rims is 60 psi (4.1 atm).

Q: What length valve should I use with the Aeolus wheels?

A: We recommend the following length valves be used with Aeolus wheels:

• Aeolus 5.0 and Aeolus 5.0 ACC — 60mm valve (or standard tube and included 35mm valve extender)
• Aeolus 6.5 — 80mm valve (or standard tube with included 62mm valve extender)
• Aeolus 9.0 — standard tube with included 78mm valve extender

Q: A lot of companies tout the low rolling resistance and low weight of ceramic bearings. So why aren’t they included in Bontrager wheels?

A: Bontrager’s goal has been to include a high-precision steel ball bearing which, when combined with our hub design, produces a low drag system without sacrificing durability. This sealed bearing includes a contact seal on the outside to protect the bearing from the elements. Most ceramic bearings have no contact seals which, when combined with ceramic balls, provide the low drag. Though faster initially, they quickly deteriorate due to exposure to contaminants and lead to significantly more drag than our standard steel bearings.