XC923 asymmetric rim profile carbon 29er bike rims

carbon XC bike
cross country 29er
mountain bike asymmetric rim
29 inch bicycle rims
29 inch mtb rims
Finish:
Weave:
Valve Stem:
Tubeless Tape:
Unit Price: $249.00
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Finish

Weight

370g+/-15

Offset

2.6mm

Tire size

1.95-2.35" (recommended)

Riding pressure

40psi(recommended MAX)

Max spoke tension

140kgf, 110-130kgf (recommended)

ERD

593mm

Weight Limit

105kg

Warranty

1 Year

Crash replacement

2 Years


The new asymmetrical XC923 rims have a modern profile and were designed as a versatile and lightweight XC/AM rim. The inner width is narrow enough to handle narrower XC racing tires, but is perfectly at home carrying 2.1-2.35” trail tires. These are ideal for 29er riders that want to upgrade their bike with something lighter, wider, and stronger but without going to the extreme in any category.


For this product line, we decided to produce only the most popular and best product styles so that we can maintain inventory. UD Matte rims are in stock and will ship within 2 business days !

* For unique hole drilling and alternate options, please contact us for special orders.

* In a addition to our standard 1 Year Warranty, Crash Replacement covers you for rider errors like chasing a big jump. This policy provides you with a 25% discount off the current retail price of the rim for up to 2-years after your original rim purchase.



PayPal discount code - Enter PP35 at checkout to receive a 3.5% discount


Our air bladders are made from a special material which produces smoother walls, result in a lighter rim, and are completely removed without harsh chemicals. They are removed through the valve hole with a unique process so that the rim does not have to be patched like traditional manufacturers use. This significantly improves the strength of the rims. Read More about our process here
Each rim carries its own layup schedule documents which are followed meticulously by the layup workers. Our Engineering team creates a unique fiber orientation which amplifies the desired riding characteristics for a given rim.
Angled spoke holes allows the nipple to pull straight in line with the spoke for reduced stress. This results in fewer broken spokes and nipples.
U-shape profile spreads the force of impacts and creates a more robust product.
The small ridges on either side of the drop channel help secure tubeless tires in place. The bead lock makes it easier to seal up tubeless tires with a floor pump, and they are incredibly hard to burp.
While the rims are optimized for a tubeless setup with the addition of tubeless tape, they also work with tubes.
The profile allows for equalized spoke tension which creates a stronger wheel that stays true.
Carbon fiber flows continuously over the bead area to provide the best impact resistance and a significant strength increase compared to a clincher rim.
Constructed with premium Toray T700 carbon fiber. The best strength to weight ratio with no expense spared.
5.0 stars -based on 78 reviews

2017-01-12

ESF :

Is there a rider weight limit for these rims?

2017-01-12

LightBicycle :

Hello ESF, Thanks for your inquiry. The max weight for XC923 rim is 105kg. But it is an approximate estimate. May I know what your weight is? What is your riding terrain normally? Do you ride aggressively? Thanks, Lightbicycle

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2016-10-04

Davis :

I would like to lace these to my existing sunringle pro sl hubs. Do you provide a way to calculate or can you tell me the proper spoke length for use with your LB rim when I order? I will need 28 hole rim.

2016-10-10

Light-Bicycle :

Hello Davis, Sorry for the late reply. We were on National Day vacation during Oct 1st ~ 7th. Regarding spokes length, it will be great if you confirm with your own builder. Because different builders and lacing pattern will use different spokes length. Or please let us know the following and we will calculate the spoke length for your reference. • Hub manufacturer name and model • Hub size as attached picture showed • Front and rear axle width • Straight pull or J-bend? • If you are using nipples with larger heads (double square, Squorx, or hex head for example), then we need to know this as the spokes are 1-2mm longer. Thanks, Light-bicycle

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2016-09-09

Marcus :

Hi, Do you have a single speed 142x12 hub option available for builds? In which brands do you stock them, Hope Pro 4, CK, DT preferred. Cheers, Marcus

2016-09-09

Light-Bicycle :

Hello Marcus, Thanks for your inquiry. Currently, only Hope pro4 32H rear 135mm single speed is available, not Hope 12*142mm single speed hub or DT single speed hub. Does that work for you? Thanks, Light-bicycle

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2016-09-01

Jim :

Hi, I just received 4 rims from you guys (they look amazing, especially the custom graphics - thanks!!!) and wondered if you could help me with spoke lengths, please? I need to build up 4 wheels as follows: 1) Lefty 1.0 front hub / 3 cross, 32 hole / 29er XC923 rim 2) Lefty 2.0 front hub / 3 cross, 32 hole / 29er RM29C06 3) DT 240s Rear hub / 3 cross, 32 hole / 29er XC293 rim 4) DT 240s Rear hub / 3 cross, 32 hole / 29er RM29C06 If you could give me an idea of the spoke lengths I'd need, that would be brilliant, many thanks and keep up the great work. Jim

2016-09-02

Light-Bicycle :

Hello Jim, Happy to hear that you like our rims. Please let us know the following and we can calculate the spoke length for your reference. But it will be better if you confirm the spokes length with your own builder. Because different builders and lacing pattern will use different spokes length. -Hub manufacturer name and model, and the size as attached picture showed -Rear axle width -Straight pull or J-bend? -If you are using nipples with larger heads (double square, Squorx, or hex head for example), then we need to know this as the spokes are 1-2mm longer. Thanks, Light-bicycle

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2016-08-19

Radek :

Hi, I would like ask you. Is it possible buy rim without decal? Thx

2016-08-19

Light-Bicycle :

Hello Radek, Thanks for your inquiry. We can manufacture the rims without decals for you. Don’t worry. Only customers require for graphic on rims, we will do it accordingly. For customers who do not mention graphic, there will be no graphic on rims. Thanks, Light-bicycle

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2016-07-28

TR :

Is it possible to get 2 of the lightest rims sorted out to get some rims close to the 355 g (370 g - 15 g)? What is usually the lightest weight of the XC923 then?

2016-07-29

Light-Bicycle :

Hello TR, Thanks for your inquiry. I checked our order system, and the lightest rims in stock currently are as below. XC923, 32H: 367g & 372g XC923, 28H: 380g & 381g Is it okay for you? Thanks, Light-bicycle.

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2016-07-07

Aloysius :

I ride most XC and occasional light trails. I am considering between the RM29C06 and XC923. Which is better and why? Also there is a big difference in price between the two. Is it only because the XC923 is newer?

2016-07-08

Light-Bicycle :

Hi Aloysius, RM29C06 and XC923: • Both rims feature angled spoke holes, a modern u-shaped profile, have a bead lock and work with or without tubes. • Our XC923 asymmetrical rims will have more even spoke tension than our RM29C06 which results in a more durable wheel build. The low tension spokes will be at higher tension compared to a traditional rim which results in less wheel re-truing. • Both rims come with a 1-year warranty. The XC923 rims have a 2-year crash replacement policy at 25% discount, and the RM29C06 have a 1-year crash replacement policy at 15% discount. • For asymmetric rims, they are manufactured by our leading workers in the production line. We have set up a special production line for asymmetric rims only. All the workers on this production line are the best in our factory. Thanks, Light-bicycle

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2016-07-01

RKK :

Please send a quote for XC923 wheelset: Boost 240 front/rear hubs 28 hole Thank you.

2016-07-04

Light-Bicycle :

Hello PKK, Thanks for your inquiry. The XC923 wheelset with following specs is USD1041/pair. -Rims: 28mm width, 370 /-15g. UD matte 28H are in stock and wheels could be shipped within 3 business days. Does that work for you? -Hubs: Black, DT 240S straight pull 6-bolt boost front 15*110mm/ rear 12*148mm. With freehub Shimano or Sram? -Spokes: Black, Pillar x-tra 1420 aero -Nipples: Black or silver? Alloy or brass? Thanks, Light-bicycle

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2016-06-21

Peter :

Hello, I'm interested in that rim as well. Could you please let me know what is available right now in 28h and 32h ? Also can you send me the cross-section drawing of the rim showing the asymetrical design and the drilling angles ? Thanks and best regards, Peter

2016-06-21

Light-Bicycle :

Hello Peter, Thanks for your inquiry. Please find attached pictures of rim profile and the drilling angle. Thanks, Light-bicycle

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2016-05-26

Ignace :

Hi, im looking for rims 29'' 32H and im hesitating between XC923 and RM29C19. Im 91kg and my bike is a steel hardtail. For crosscountry marathon over 60km and races. Wich one would be better ? Wich one is available the fastest ? Need 32H 3K glossy or mat No decalcs

2016-05-27

Light-Bicycle :

Hello Ignace, Thanks for your inquiry. According to your info, the RM29C19 is more suitable for you. The rim is much wider and stronger. Ideal for large riders. Thanks, Light-bicycle

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