DURABLE AND STURDY DESIGN – Alpcour always put emphasis on making durable and high quality products therefore, only uses high quality materials. Alpcour Indoor Training Block is manufactured using premium quality plastic molded to a well developed design that ensures stability and durability of the product through continuous usage. Use it without the worry that it might suddenly break and cause unexpected scenarios. NATURAL RIDING SET-UP – To imitate normal riding conditions a biker usually experiences during rides, Alpcour Indoor Training Block was designed to partially lift the front wheel of the bike. This design allows a natural riding position which is deemed to be ideal for training. No worry that it might make you uncomfortable in your actual rides. PERFECT FOR INDOOR TRAININGS – Alpcour Indoor Training Block is very ideal thanks to its durability and design. The durability enables the user to focus and exert more energy during training. The design significantly increases the efficiency of the training done. With these two complementing characteristics you can train hard and reach your peak state even through indoor training. WITH ANTI-SKID FEATURE – To avoid indoor training difficulty and possible accidents, Alpcour Indoor Training Block was equipped with an anti-skid pad on the bottom of the front wheel block to ensure maximum security. It keeps the training block in place even with high intensity training. In addition, it also helps in keeping your floor scratch free. COMPATIBLE WITH MOST OUTDOOR BIKES – Alpcour Indoor Training Block was made to be compatible with most road and mountain bike wheels sizes. This includes the diameters of 26”, 650b, 700c, 27.5” and 29” and widths from 23” up to 29.3”. This is ideal for bike enthusiasts that have multiple bikes since it is compatible with many tire sizes. Alpcour Bike Front Wheel Riser Block for Bike Trainer Stands