OneUp have found that a lot of 35mm clamp diameter bars on the market

000" round

Blunt nose to maximize usable climbing area

Metric and English readings

-100mm long

Evoc Hip Pack Pro 3L + 1.5L Bladder Hydration Pack - Carbon Grey - Black Dropship OneUp have found that aThe HIP PACK PRO 3 is perfect for carrying tools, snacks and beverages while still offering full range of movement for ambitious trail riding. Thanks to the EXTRA WIDE HIP WINGS, the ventilated AERO FLEX belt and the optimized AIR FLOW CONTACT SYSTEM it not only sits safely and closely in place, it also distributes the weight perfectly for extra comfort. Wide ventilation channels and the coarse mesh on the back section provide efficient airflow