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Standard, Flyweight and Heavy-Duty, What’s the Difference?
Standard, Flyweight, and Heavy-Duty rims do not refer to certain rim models, but
styles. Since there are so many different kinds of riders, terrain, events, and
we need to fine-tune our rims to be more suitable for your situation. It’s not as simple
changing the weight of the rim by adding or removing carbon layers. The entire layup
needs to be
redesigned to ensure the strength and ride characteristics are suitable for a given
If you’ve decided which style to go and wish to make sure the rim model you pick can be
the specific version, you can skip to the charts at the bottom of
Who is it for?
Middleweight riders of most riding types (XC, road, all-mountain,
general trail riding, and even light Enduro).
What is the Standard style?
The rims we make with our standard layup are made exclusively with Toray T700.
The production process is simplified when using one primary fabric type. Toray
T700 has a nice balance of stiffness, weight, and strength, making it a great
choice for the high-value rim.
Super clyde riders (over 220lbs) or aggressive riding.
What is Heavy Duty?
For our heavy-duty (HD) rim version, we add material in some key areas and
rework the angles on our standard layup. The largest change is adding a layer of
carbon (typically 3K weave) wrapped around the air bladder in the opposite
orientation of the previous wrap. The end result is an increase in overall
strength, wall thickness, and stiffness. These rims are more suitable for
heavy-duty applications as they can handle g-out forces, rock abrasions and
compressions better than our lightweight rims.
Generally speaking, an HD rim adds approximately 50 grams over their standard
counterpart, but rim diameters including the spoke length required are the same
for both styles.
What is Flyweight?
Our Flyweight layup is significantly different from our other styles. We
still use T700, but also introduce Toray’s T800, which is lighter and
stiffer in comparison. Rims that are exclusively made with T800 are too
stiff and can become brittle, so we use a blend.
Typically there is more stress introduced between the T700 and T800
layers because of the stiffness difference between material types. We
solve this by using thinner unidirectional prepregs with a very low
fiber areal weight which allows for a more adjustable layup. Since there
are many more layers to build up the same thickness of a standard or HD
rim, it’s more time consuming to perform the layup and there is
significantly more material used. Internally, we vary the thickness at
the nipple bed to reinforce the spoke holes while eliminating excess
material in between.
The result? Flyweight rim comes in with an incredible lightweight, but
also inevitably with a bit of compromises in strength and stiffness.
Even with our Pro series, the flyweight rims are not as strong as the
Our Flyweight layup is suitable for paved road, cross
country, and XC marathon riders or for those looking to build the
lightest wheels. The weight limit is 90kg (198lbs).
Flyweight of Various Finishes
The claimed weight of the Flyweight version online is with a matte
finish. If you want a glossy or satin paint, the rim will add an extra
8~10g. Our Pro series models do not come with other finishes as they
come out of the mold as a finished product.
Check the charts to see if your go-to models are available in Flyweight or Heavy-Duty
(some are not offered as an option in the Buy & Configure part on the product pages,
feel free to contact us).
Also, we produce some models in Ultra-Light or HD-Plus styles to meet the needs of
superlight riders or more extreme uses.
Please email us (
email@example.com) to special order.
If you are on the fence between categories, consider the lighter version up front, and
the heavier version in the rear. The rear wheel sees far greater forces compared to the
front wheel so it’s perfectly acceptable to mix layups within the wheelset. If you’re
not sure which to choose, please send us an email describing your riding situation.
The customization fees for flyweight or HD style range from $8 to $20 per rim. Please
contact us or leave a comment if you have any questions.
I’m looking for an inexpensive lightweight disc wheelset for my Specialized Cruz. I already have a set of your wheels with 38mm gravel tires. I want my second set for road tires (28-32).
I weigh 165 lbs. and the wheels will be for road rides only. Fast and light is my focus for my new wheels.
For your new wheels, will you be expecting to do steep climbs? What 700C road disc rims do you have in mind so far? Which toad tires do you plan to use and with what pressure? Overall, I think the AR35 or AR375 would be good options. As for the hubs, I would say Carbon Ti is the most cost-effective hub option. We have black ones in stock.
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I want to build a wheelset for my 2018 cervelo s3 disc, I plan to use a conti gp5000 25mm tires. What do you recommend for me I want a flyweight wheelset 45-55mm deep. What are the differences between the ar, r, wr wheelsets and will it fit my 2018 cervelo s3 disc
May i know your weight please? Is it windy a lot there? Then we can check AR44 or AR55 is better.
For R series, it is 25mm wide 700C.
For AR series, it is 28mm ~30mm wide 700C .
For WR series, it is 32mm wide or wider 700C .
Hi, I have purchased rims from you before. I’m looking to custom design a top of the range ultra light rim set suitable for climbing on paved roads. My bike can accommodate up to 25mm wide rim in 700c size. I ride a Bianchi Oltre XR4. My weight is 72kg. My group set is SRAM Etap 11 speed.
Pls propose a wheel set with focus on lightest weight and best rolling resistance. I would like high quality bearings and hubs.
For Bianchi Oltre XR4 bike, we recommend below AR35 28mm wide road disc wheelset for you. We just sent and email to you, please check.
Hi. Is the Flyweight weight limit on the rider or the rider plus bike? I am 80kg and riding a bike that will weight c 8kg or just over 10kg with full Bidons etc
The limited weight refers to the rider weight, not rider+ bike's weight. Some special make light version has a special request for the rider weight, which bike rim are you interested in? I can check if your profile is a good fit for the rim before you settle anything.
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