Bontrager Connection 32 hole double wall hub size? Forums › Mountain Bike Forum › Bontrager Connection 32 hole double wall hub size? --SHARES Tweet Add to Flipboard Magazine. Tagged: Drivetrain upgrades This topic contains 0 replies, has 1 voice, and was last updated by andan18t 1 year, 6 months ago. Author Posts March 29, 2018 at 5:04 am #237529 andan18t Hey everyone!, im new to mtb and just got a Trek Marlin 5. It comes with Brontrager Connection 32 hole double wall wheels. My question is, does anyone know what size the hub is for the cassette? Thinking maybe a 1×10 upgrade in the future. Wondering if this is possible or am I capped at a 9 speed cassette? Some of the X-Caliber bikes come with these same wheels and have a 9 speed on the back. Thanks Author Posts RELATED TOPICS Topic Voices Posts Freshness What does your bike weigh? Started by: mongwolf in: Mountain Bike Forum 17 20 6 months ago Sean Gordon What upgrades with $500 Started by: BigToeBotany in: Mountain Bike Forum 14 16 7 months, 1 week ago DianaGosh What used mountain bike should i get? Started by: joey_cel in: Mountain Bike Forum 5 5 1 year, 1 month ago Alvin Mullen Time for tech to trickle down. Started by: Daniel Tribby in: Mountain Bike Forum 6 9 1 year, 5 months ago Jonnorth Upgrades to improve bike fit Started by: bwalter0822 in: Mountain Bike Forum 5 17 1 year, 9 months ago mongwolf You must be logged in to reply to this topic.