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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)

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

Model	AD930-XC	AD930GP-XC	AD933GP-XC	AD933-TR	AD938-AM	AD938-EN	AD940-EN
Cross Section
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
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.

hot tags :

mtb carbon rims carbon mountain bike rims 29er asymmetry carbon mtb rims

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29er Asymmetric New Fly Weight Mountain Bike Rims

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