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Zipp’s ultimate aero weapon is faster than ever, thanks to our proprietary Total System Efficiency technology. With TSE, the 858 NSW Carbon Tubeless Disc-brake wheelset features a tubeless and hookless rim profile for seamless tire interface and huge drop in weight. The 858 gives you the benefits of our deep rims at weight typically associated with rims that are 20mm shallower. The wheel’s internal width is 23mm, ideal for running wider tires with lower pressures for decreased rolling resistance. That’s how TSE technology helps you conquer the four barriers to speed: Wind Resistance, Gravity, Rolling Resistance, and Vibration Losses. The 858 NSW’s undulating 82mm-85mm deep rim shape, our patented Sawtooth profile, is our highest performing design for aero efficiency and crosswind stability. The 858 NSW features Zipp’s Carbon Internal Reinforcement (CiR), which creates a rim that is 10% lighter and just as strong as previous wheels. The result is the pure speed, especially for triathletes, time trial specialist, and any other speed freak. What’s more, while this wheelset is optimized for tubeless tires, you still have the option to run tubeless ready tires with tubes. The 858 NSW is fastest with a 28mm tire. In triathlon, running wider tubeless tires at lower pressure makes you faster while also smoothing out the ride so your body is fresher for the run. Disc brakes also off er more reliable speed modulation and braking power in all weather conditions. At the center of the 858 NSW is the Cognition V2 Hubset engineered with the Axial Clutch V2 mechanism for quicker engagement and lower friction as well as improved durability.
We’ve employed Zipp’s ImPress graphics technology, which prints graphics directly on the wheel, to help allow the dimples to do what they were design to do – help control vortex shedding, the rate at which air sheds off the wheel. Managing this is crucial to stability.
SawTooth is the name given to Zipp NSW’s patented variable depth 53/58mm rims. Developed utilizing the principles of the emerging science of biomimicry, Zipp engineers began the rigorous aero development process of SawTooth utilizing the wind tunnel, CFD, and real-world testing. The result is a rim shape that takes nature’s most elegant design solutions and combines engineering precision to deliver a wheel that performs unlike any made before.
This patented new rim shape achieves something conventional aero wheels cannot; it simultaneously reduces both aerodynamic drag and side force for the ultimate in AeroBalance. Sawtooth accomplishes this with a series of patented fin-shaped Hyperfoil nodes along the inner diameter of the rim that work together with our new HexFin ABLC dimples for improved airflow. The result is Zipp’s highest performing wheelset ever realized with both aero-drag reduction and reduced side force at all wind yaw angles. This is important because higher wind yaw angles are where bike handling is most affected by the wind.
Hyperfoil is the name given to the individual nodes on Zipp NSW variable depth Sawtooth rims. Each of these patented structures features our HexFin ABLC dimples that help to stabilize handling in gusting wind by increasing wind vortex shedding frequency. The higher frequency vortex shedding produced by Sawtooth creates a greater number of smaller, less powerful, yet more predictable vortices leading to greater wheel stability. This added stability translates into greater rider control, thereby saving energy that is typically expended trying to hold a line in gusting wind. The result is a faster, more confident riding experience whether you are laying down power or descending sinuous mountain roads.
HexFin ABLC dimples are the hexagonally shaped depressions found at each Hyperfoil of our Sawtooth shaped NSW rims. The angular shape of each dimple increases boundary layer mixing to help keep airflow attached to the rim for reduced aerodynamic drag and improved stability in crosswinds. To further improve the effectiveness of the hexagonal dimples, they are arranged in fin-shaped clusters made up of variable sized dimples that work in concert with each Hyperfoil of a Sawtooth rim.
Zipp’s TSE Technology (Total System Efficiency) was developed by our engineers in the Nest Advanced Development Lab in Indy. This approach to carbon-wheel manufacturing means the 303 Firecrest’s precise rim layup results in greater all-around efficiency for greater speed through reduced: Wind resistance, rolling resistance, gravity (weight + durability), vibration losses
Axial Clutch V2
Zipp's NSW-level Cognition V2 Hubset is re-engineered with an updated Axial Clutch V2 mechanism for quicker engagement and lower friction and improved durability. Cognition rolls efficiently whether you are pedaling or coasting.
Approximately 5-7 days total
1-2 business days (Wheels sold without accessories or installation)
1-2 business days
All orders are processed within 1-2 business days.
Orders placed after 5pm Friday and on weekends will be processed the following Monday. Orders placed on holidays will be processed the following business day.
Once your order has been processed, please allow for 2-3 business days for it to be shipped.
Please note we do not currently ship to P.O. boxes or APO/FPO Addresses.
Once your order has shipped you will receive a shipment confirmation and order tracking email.
We want you to be beyond happy with your purchase from My Bike Shop! So most bikes, wheels and gear we sell are backed by our 30-Day Satisfaction Guarantee. We're able to offer this because every bike must meet our rigorous and meticulous 72-Point Inspection before being sold and shipped, and all wheels and gear must meet specific certification standards as well prior to shipping. If for any reason you're not satisfied with your item(s), just let us know and we'll make it right or take it back. It's that simple. We aim to please, but if the item(s) and our service do not meet your expectations or work out otherwise, just ship it back our way for a refund (certain fees may apply).
All orders are covered by the MBS 30-Day satisfaction Guarantee, but in some cases there are re-stocking fees associated with the cancellation or return of an order. Please review the following guidelines as it relates to your order:
Canceled orders of any* item prior to shipping will be refunded 100%.
Items that have been modified in any way (including decal removal) cannot be returned or refunded.
Wheels that have been damaged in any way, or are otherwise now unrideable cannot be returned for a refund, but must go through warranty or crash replacement.
Helmets that have had tags or safety stickers removed, or have been ridden in are not eligible for return.
My Bike Shop cannot be held liable for warranty claims or labor charges carried out by any other business.
Orders for return that have shipped to the customer, are within the 30-Day window and have been installed or used otherwise, can be returned for a refund minus a 15% restocking fee once received back in the MBS warehouse. Return shipping is the responsibility of the customer. MBS will review item(s) once received to verify condition prior to issuing the refund.
Wheel accessory installation fees are non-refundable.
Items that have been damaged from use during the 30 day period are not eligible for return. This includes, but is not limited to: Scratched or dented wheels, scratched or gouged items of any kind, items that have been damaged by improper installation, items with damaged bolts.
Electronics (including, but not limited to activity monitors, GPS-enabled devices, bike trainers, emergency-communication devices, and cameras) that have had their sealing stickers broken, have been removed from the box, turned on, had the screen protector removed (if applicable), used, or otherwise set up for any length of time will incur a 15% restocking fee.
*Soft goods with tags removed, or that have been worn are not eligible for return, and are exempt from this policy.
Custom ordered wheels, small parts or soft goods cancelled before receipt of the item(s), are charged a 10% restocking fee. For custom orders of wheels, small parts or soft goods returned unused within the 30-Day Guarantee window, we charge a 15% restocking fee and any shipping fees are at the expense of the customer.
As part of our commitment to 100% customer service satisfaction, you receive a no questions asked refund for most unused non-custom bike, wheels and gear purchased directly from My Bike Shop. You don't even have to call.
Once you've purchased with us, you have until you receive a tracking code to cancel. Once the item is shipped, you're covered by a 30-Day Guarantee. For custom ordered wheels, small parts or soft goods cancelled before receipt of the item(s), we charge a 10% restocking fee.
For custom orders of wheels, small parts or soft goods returned unused within the 30-Day Guarantee window, we charge a 15% restocking fee and any shipping fees are at the expense of the customer. Custom ordered complete bike builds completed by MBS require a 15% restocking fee if cancelled prior to shipping or 20% if returned unused within the 30-Day Guarantee window.
Warranties are at the discretion of the manufacturer.
The buyer is responsible for all return shipping costs.
My Bike Shop cannot be held liable for warranty claims or labor charges carried out by any other business.
If a replacement item is purchased by customer for immediate shipping, the transactions will be deemed as unrelated, and the following steps will still have to be followed for the item in question.
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