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Why Hookless?

LIGHTWEIGHT PERFORMANCE

Compared with hook-type rims, adding inner width on hookless rims costs much less in weight because the outer width can be maintained while the inner size is enlarged. Giant’s all-new, wider inner rim width hookless design allows a smaller, lighter tire to have the same volume as a larger, heavier tire, resulting in a lighter overall weight.

ENHANCED DURABILITY

Giant’s hookless rim design is realized through an innovative manufacturing process that results in a more continuous carbon fiber structure. This process enhances durability and increases impact resistance with no weight penalty compared to the current SLR line.

CONFIDENT HANDLING

Hookless rims also help create a more round tire shape that provides superior grip and handling as well as added sidewall support when cornering.

TIRE RETENTION AND COMPATIBILITY

Like any modern tubeless system, the tolerances of the tire bead diameter and hookless rim bead seat diameters must be carefully calibrated in order to create an airtight seal that will allow the tire to stay on the rim and the rider to slow to a safe stop in case of puncture. If the tire bead diameter is too large, it will not match the rim bead seat diameter. Likewise, if the bead material isn’t strong or stiff enough under high pressure loads, the tire bead will stretch over time and it will lose its original diameter. If rim manufacturers do not work directly with tire manufacturers when designing new hookless rims, tolerances and bead materials can vary, making it difficult to safely pair tires and rims.

WHAT SETS GIANT HOOKLESS APART?

Rather than using a Kevlar-only bead, which can stretch over time and compromise the tire bead diameter, Giant tires feature a carbon and Kevlar composite bead that’s strong enough to avoid stretching under heavy loads. This, combined with our accurately defined tire and rim bead seat diameters, tested at pressures up to 150psi, guarantee dependable air and tire retention.

TIRE PRESSURE

No matter what type of rims or tires you are using, never exceed the maximum pressure stated on the rim or tire. Always follow the lower of the two maximum recommended pressures.

TIRE COMPATIBILITY

Giant tubeless tires are always the best match for Giant WheelSystems. However, should you choose to use a non-Giant tire, we have created an approved list of tires that we have tested to be 100% compatible with Giant WheelSystems rims. Below is the current list of tested and approved tires:

For tires not on the Giant Approved Tire List, we are working with manufacturers so updates can be made to approve them. However, be aware that if you choose to use a tire that is not on the Giant Approved Tire List, you do so at your own risk, and we cannot guarantee that the tire will function correctly and safely with the Giant Tubeless WheelSystem featuring a hookless bead.

If necessary, you may use an inner tube on a Giant hookless rim, so long as the tire you are using is on the Giant Approved Tire List. However, please note that Giant hookless rims are designed to perform best when set up as tubeless and used without an inner tube.