Alpcour Bike Front Wheel Riser Trainer Block with Anti-Skid Design – Compatible with Stationary, Mountain and Road Bikes – Natural Riding Position Set -up for Indoor Training sold2026 or 1/2" NPT rate with

or 1/2" NPT rate with restricted orifice

you just need to rotate the cone shaped part to adjust the base size

Specifications:16A

Product Name : RJ9 Telephone Connector

Alpcour Bike Front Wheel Riser Trainer Block with Anti-Skid Design – Compatible with Stationary, Mountain and Road Bikes – Natural Riding Position Set -up for Indoor Training sold2026 or 1/2" NPT rate withAlpcour Bike Front Wheel Riser Trainer Block with Anti Skid Design Compatible with Stationary, Mountain and Road Bikes Natural Riding Position Set up for Indoor Training Read more THE BEST TRAINING ACCESSORY FOR INDOOR BIKES! The Alpcour bike trainer riser block is specially made for stationary bike trainers, and best partnered with the Alpcour trainer stands. This premium quality bike riser will keep your bike stable and level while youre spinning.