After around one year experience on 26er DH rims manufacturing and customers’ ride testing, we design below new carbon 26” mtb downhill rims. It will be our strongest and the most durable carbon mountain rims for downhill/freeride/Enduro bikes. Rim Size: 26-inch/26er mountain bike Rim Construction: Tubeless, Carbon fiber Rim Depth: 32mm Width: External: 38 mm, Internal: 31 mm Rim weight: 420g+/-15 for All mountain; 480g+/-15 for Downhill Below is the advantage of this carbon 26er mountain Downhill bike rims *Widest, tallest profile and stiffness, strongest: 38mm width and 32mm depth strongly improves 26” dh wheels’ rding performance. Also the carbon fiber construction makes this 26-in-wheel with excellent stiffness, impact resistance, tracking and cornering performance. *bead-less& tubeless:bead hookless rim wall is more smooth and straight, the tire will touch rim walls fully and mounted perfectly, allowing to run lower tire pressure without risk of air loss or pinch flats.bead hookless carbon rim walls is not only provides better tubeless seal, also it is more durable and much stronger than original 26er carbon rim hook design. *Bead lock: the small ridges on either side of the drop channel.Some riders concerns the transition to bead hookless rim profiles will cause tyres blowing off or an increased likelihood of burping air from tubeless tyres. So we add bead lock ridges to make them with any fear and ride confidently. *New process: now all mtb rims are manufactured by using our new manufacturing process.Learn more about the new manufacture process for mtb rims. *Terrain: downhill/freeride/Enduro It is the best 26er carbon rim for Downhill mountain biking wheels. We have started this manufacturing of this DH carbon wheels rim mold. It will be ready for sale around 2014 September 10th . Pre-order is accepted from now on!
Rim Size: 27.5 inch / 650B mountain bike Rim Construction: Tubeless, Carbon fiber Rim Depth: 24mm Width: External: 27 mm, Internal: 22 mm Rim weight: 320g+/-15 Below is the advantage of this carbon 27.5 mtb wheel rim *Light weight: Incredibly strong and ridiculously light, the 27mm with & slightly U shape design makes these 27.5 rims super stiff & light weight. *Beadless: hookless rim wall is more smooth and straight, the tire will touch rim walls fully and mounted perfectly, allowing to run lower tire pressure without risk of air loss or pinch flats.hookless carbon rim walls is a way to improve impact resistance, so it is more durable and much stronger than original 27.5-inch wheel hook design. *Bead lock: the small ridges on either side of the drop channel. Some riders concerns the transition to hookless rim profiles will cause tyres blowing off or an increased likelihood of burping air from tubeless tyres. So we add bead lock ridges to make them without any fear and ride confidently. *New process: now all mtb rims are manufactured by using our new manufacturing process.Learn more about the new manufacture process for mtb rims. *Terrain: cross country/trail It is the best choice for 27.5 XC wheelset, and make your 27.5 hardtail bike super light for racing. We have started this manufacturing of this 650B XC rims mold. It will be ready for sale around 2014 September 10th. In 2011 year, our first 29er carbon rim 30mm wide is very popular. All these years, we have designed quite a lot of mtb rims accordingly to customers’ suggestion & demand, like mtb 26er carbon rim, 650B, 29er wider rims and more durable carbon rims for DH riding. We are keeping on improving rim structual design, the balance between strength & weight. Our factory has more carbon mtb manufacturing & design experience. We are sure this mtb cross country 650B rim will be popular, and in the coming future, we will also make the same profile for 29er XC & 26er XC rims.
Quite a few customers are waiting for a few months for this new bead hook-less carbon rims. Please find as below rim specs. Size29 inch Outer width27mm Inner width22mm Depth24mm ERD592mm BSD622mm Rim weight365g+/-15 for XC Cross Country410g+/-15 for AM All Mountain It is quite hard to imagine how to secure the tire without any bead hook. Actually hookless rim design is not new, it has been used on automotive wheels for quite a long time. It is also hook less design & using tubeless tire. Now hook less design is started to used in bicycle rims. automotive tubeless wheels MTB 29er tubeless rim automotive hooke-less rim carbon 29er hook-less rim This rim is without bread hook, it is ok to hold tubeless and tubeless-ready tires. No need to use hook less ready tires. Our engineer started to study hookless design quite a long time ago. There is similar rim on the market, there is zero issues of holding tires for hook-less rims. The rim wall is more smooth and straight, the tire will touch rim walls fully and mounted perfectly. We have set up tubeless tire on it. It works well, absolutely zero air leaks. hook less 29er rim and tubeless tire the tire is mounted on rim start to inflate the tire use-soapy-water-to-check-whether-there-is-any-air-leakage prepare to mount the tubeless tire using yellow tape then adding sealant inflate the tire to 45psi using the same method to double check a while later Compare to head hook design, the hook less design is more durable. Because the rim wall structure is simpler. Then carbon fiber will be more continuous. It will be stronger than a hooker carbon rim at the same weight. Here is the testing data that we have done. Spoke tension test:Randomly choose some spoke holes for spoke tension test. 29er hook-less rim spoke tension test hook-less rim tubeless spoke tension test The testing data for spoke hole NO.1: around 374.26kgf, the nipple cracked, there is no crack on rim spoke hole The testing daat for spoke hole NO.2: around 305.68kgf, the spoke cracked, there is no crack on rim spoke hole Since the spoke & nipples are crack while testing, we can not get the max spoke tension of spoke holes. But we get the result the spoke holes can hold more than 300kgf tension. Rim Impact test: carbon 29er hook less rim impact test While the load is around 172.98kgf, the rim cracks at the vale hole area. (Pass: LB stiffness standard is 150kgf) Carbon hook-less 29er rim impact test data sheet Max load Max Elongation Energy absorption Breaking strength Test time Max displacement Max Elongation 172.98kgf 47.07% 4563.50kgf.mm 18114.96kPa 4.89min 49.03mm 47.07% If customers like to build light 29er bikes for XC riding, this rim is the best choice. It is pretty light & strong. It will become popular for light-weight 29er wheels & no tubes 29in wheelsets. Buy it now: bead hook-less rims carbon 29er light bike rim tubeless compatible >>
These days, we have got quite a few mails from customers. They are confused at our UD U-shaped 45mm clincher rims. They see 3k weave on rim bed and consider the rims are 3k, not UD actually. Please check as below, then you will understand the rims are with UD construction. For more detail information about 3k/12k/UD carbon fiber: The 3k 12K UD carbon fiber weave for rim and frame No matter 3k/12k/UD rims, all the inside carbon fiber are UD carbon fiber, UD layers are applied at different angle on each other. They are still not identical. For example, the orientation are different( some are placed at 0 degree, some are 45 degree, 90 degree,etc.). It is very important to use right orientation for carbon layers. Our engineers will use experience & testing result to use the best orientation for each carbon layer to make the rims with best strength. For 3k rims, it is only the top layer in 3k weave( only one layer 3K, all the inside are UD). For 12K rims, it is the same. Only the top one layer is 12K weave. For UD rims, it is around 99.9% carbon fiber layers are UD, only one small 3k layer on the top of rim bed, to prevent carbon fiber split after spoke holes machining on rim bed. UD Rims UD Rims bed UD Rims cross profile 3K Rims 3K Rims bed 3K Rims cross profile But there is one mechanical benefit for 3k woven carbon fiber. Putting the 3k woven carbon fiber around hole area& machining, it can prevent carbon fiber from laminating while machining. That is why 3k weave(only 1pcs small layer) on the top of rim bed. And one 3k layer on the top of rim bed will make the rim looks special and nice. So, our UD rims are not 3k construction, it is really UD rims 700C U-shaped. Please contact us if there is any question of rim construction. We will let our engineers reply accordingly and share more detail Technology about U shape 45mm clincher. It will be better if customers help to offer some suggestion.