CMI Ultrabrake


Crafted from an ultra high strength polymer designed to outwear some metals, nylons, and urethane. Designed for hard use and maximum UV resistance, the material has a low friction coefficient and is self-lubricating with a non-adherent surface. It’s black color blends in with forest surroundings and galvanized hardware prevents rust for a long lifetime. Available in two different sizes to accommodate a wide range of cables. Mounts around cable and attaches to a static point with a bungee cord (not included). This brake block is sold as a component to an integrated braking system. It is designed to be used as part of a gravity based brake system and be attached to a shock cord. It should never be used alone or without a backup emergency brake in the event of a failure. There are two eyebolts installed in this block. One should be rigged to take the impact from the rider. The second should be connected to the first with a slack tether.
ULTBRK1.2- size: 8.25in (21cm) x 3.375in (9cm) Weight: 5.90lbs (2kg)
ULTBRK7.8- size: 8.25in (21cm) x 4.00in (10.16cm) Weight: 6.50lbs (2kg)

Part Number:


Part# ULTBRK1.2
Max Cable Diameter: 3/8” – 1/2”
Weight: 5.90 lbs
Body Material: Ultra High Strength Polymer
Width: 3.37”
Height: 8.25

Part# ULTBRK7.8
Max Cable Diameter: 5/8” – 7/8”
Weight: 6.50 lbs
Body Material: Ultra High Strength Polymer
Eye Bolt Material: Galvanized Steel
Width: 4.0”
Height: 8.25

Additional information





7/8", 1/2"


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