29er Asymmetry rims

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Mountain Bike 29er Asymmetry Design MTB Carbon Rims

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Mountain Bike 29er Asymmetry Design MTB Carbon Rims

- Asymmetric design, help to equalize spoke tension.

- Optimized bead seat angle design.

- Ridus support design nipple bed.

- Ultra smooth inner wall.

  • item no.:

    AD-29
  • product orgin:

    China
  • payment:

    Paypal, Bank transfer
  • color:

    UD/3K(customized painting acceptable)
contact us
  • specification
  • Technology

LightCarbon Mountain Bike Rims 29er Asymmetry Design MTB Carbon Rims

mountain bike carbon rims asymmetric design


Features:

- Asymmetric design, help to equalize the spoke tension between drive side and non-dirve side of wheels.

- Thick side wall design for better impact resistance.

- Radius support nipple bed design, distribute spoke pull force evenly around each spoke hole.

- Ultra smooth inner wall, for even wall thickness and strength.

- Tubeless Ready.

- With super light weight (Graphene) version optional.


Graphene prepreg VS regular prepreg


29er Mountain Bike Rims Asymmetric Design MTB Carbon Rims

 Mode AD930-XC AD930GP-XC
AD933GP-XC AD933-TR
AD938-AM
AD938-EN
AD940-EN
Cross Section
mtb carbon rims AD930-XC
mtb carbon rims AD930GP-XC
mtb carbon rims AD933GP-XC
mtb carbon rims AD933-TR
mtb carbon rims AD938-AM
mtb carbon rims AD938-EN
mtb carbon rims AD940-EN
Terrian Recommended
Cross Country
Cross Country
Cross Country
Trail
All Mountain/Enduro
Enduro/Ebike
Enduro
Material
Toray T700

Toray T700

+ Graphene

Toray T700 

+ Graphene

Toray T700 

Toray T700
Toray T700
Toray T700
Weight
360±15g
310±15g
340±15g
380±15g
450±15g
490±15g 490±15g
Max Weight Limit
120kg/265lb
100kg/220lb
100kg/220lb
120kg/265lb
120kg/265lb
120kg/265lb
120kg/265lb
Sectional Drawing
mtb carbon rims AD930-XC
mtb carbon rims AD930GP-XC
mtb carbon rims AD933GP-XC
mtb carbon rims AD933-TR
AD938-AM carbon rim
carbon rims AD938-EN
mtb carbon rims AD940-EN
Width 30mm 30mm 33mm 33mm
38mm 38mm 40mm
* ERD 595mm 595mm
589mm 589mm
583mm 583mm
583mm
Carbon Weave UD/3K/12K
UD/3K/12K
UD/3K/12K UD/3K/12K
UD/3K/12K
UD/3K/12K
UD/3K/12K
Max Tire Pressure 40psi/2.7bar
40psi/2.7bar
40psi/2.7bar 40psi/2.7bar
35psi/2.4bar
35psi/2.4bar
35psi/2.4bar
Tire Size Recommended 29*2.0''-2.4''
29*2.0''-2.4''
29*2.1''-2.5'' 29*2.1''-2.5''
29*2.3''-2.8''
29*2.3''-2.8''
29*2.35''-3.0''


*ERD Calculate

ERD is short for effective rim diameter, it is the maximum distance that spokes bridge going from one end of the rim to another.

How do we calculate the ERD of our rims? Below are calculation equation and sketch for your reference:

mtb carbon rims ERD calculate

ERD=Rim outer diameter-(rim depth)*2+(Rim nipple bed thickness)*2

For example:
ERD of AD930-XC rim=633mm-22mm*2+3mm*2=595mm

Most people prefer ERD including the length of the nipple head. 

However, customers may use different nipples and components for building. 

Please add the length of the nipple head (2.5mm~3mm generally) for your spoke calculation. 

If the length of the nipple head is 3mm, then ERD of your AD930-XC rim is 595mm+3mm*2=601mm

A: Rim nipple bed thickness (=3mm)
B: Length of nipple head (2.5mm~3mm generally)



Graphene prepreg testing result

Graphene prepreg helps to improve the strength of carbon rims up to about 20% (if weight unchanged), 

or reduce 15% weight (keep strength unchanged).Above is the testing result .


Graphene-prepreg-testing-chart


LightCarbon MTB rim has passed UCI 120J impact testing (double of UCI standard 60J !)


The falling mass weight is 17.5kg, and the testing height is 700mm (=overall height 1310mm-610mm initial height). 
So the impact testing energy is 120J. (=17.5*9.8*0.7)


Why Asymmetric Design?


Asymmetric design is becoming a new trend in mountain bike rims.

Wheelsets built with asymmetric rims are of better strength, stiffness and durability.

The main advantage of asymmetric rim is: it helps to equalize the spoke tensions between drive side and 

non-drive side of wheels.

How? Please refer to below illustration:Asymmetric rim VS Symmetric rim

In mountain bike wheelsets with disc brake, the center of rear hub (Point A) is not in the same position of the center of flange (Point B). The center of hub (point A) is closer to the drive-side. During wheel truing, in order to get hub to the center of rim, the spokes are pulled to higher tension on drive side (compared to non-drive side).

Similarly, in MTB front wheel, the center of hub is closer to the disc rotor side (non-drive side), which makes the non-drive side spoke tension higher than drive side.

The spoke tension difference is normally as large as 40%! Such big difference makes the wheelset weaker as it could be. 

As the higher spoke tension side always break easier, while the lower spoke tension side always loose easier.

 

Asymmetry rims are made to solve such issue.

In asymmetric wheels, the bracing angles are improved by make the nipple holes offset to the center.

Thus, the spoke tension between drive side and non-drive side is much more equalized.

Our asymmetric rims are with 2.6~3.5mm offset from the center (a bit different for different width of rim), which helps to improve the spoke tension over 20%.

Therefore, wheelsets build with our asymmetric rims are of better strength, stiffness, and will stay true longer.

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We will reply you within 24h after received your inquiry

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