Proterra Light i27

Get Proterra Light i27 wheels at a special sale price. Designed for durability and high performance, these wheels are ideal for your mountain biking adventures. Buy now!

$136.95

$389.95

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Variant

SKU: W045-0219

Free shipping $100+Contiguous US only

Free shipping for orders over $100, excluding deliveries to Hawaii and Alaska.

Orders are typically processed within 1-2 business days and shipped via UPS standard ground service from our warehouse in San Rafael, California.

30 day return policy

Decide a product wasn't for you? Return any unused product for up to 30 days with no questions asked.

Warranty policy

We guarantee our products for at least two years.

Usage Cross-Country / Trail

Product description

Proterra Light i27 are everyday wheels for the everyday trail bike. Your bike that does all deserves a wheel that'll do the same. The 27mm inner rim width strikes a happy medium on the width spectrum and allows it to provide optimal air volume and casing profile on tires in the 2.3-2.5" range. The open-cavity rim profile eliminates weight where it isn't needed while also allowing for a smoother ride. The responsive 6-pawl freehub provides 5 degrees of engagement and allows you to ratchet through techy climbs while also providing instant power as you pedal out of corners. Looking to go wide on your downcountry build? Even XC is going bigger.

Frequency Hub

Frequency hubs feature a low-drag, 6-pawl design that alternates contact between two sets of 3-pawl groupings to provide a responsive 5 degrees of freehub engagement.

Solid Strip & TCS Tape

Durable nylon strip that lies between the rim and tubeless tape to prevent tubeless tape from pushing into the spoke holes and ensures a smooth interface between the tire and rim. The smooth surface makes it easier to mount a tire by preventing air from escaping around the bead at each indent during inflation. Solid Strip also protects the airtight system from puncture in the case of a broken spoke.

3-Cross Lacing and Alloy Nipples

Trail wheels need to strike the perfect balance of lightweight performance and daily dependability. Proterra Light i27 wheels provide the longterm reliability of a 3-cross lacing pattern with the weight savings of alloy nipples.

27mm inner rim width

Daily trail riders riding 2.3-2.5" tires often choose rims with an inner rim width of 27mm due to the balance of high-volume sidewall support and lightweight performance. This is the excellent rim width for trail riders who value the climb or XC riders who prefer the descent.

Hand-Built in California

Proterra wheels are hand-built in our California wheel building facility at the base of Mount Tamalpais, where mountain biking began. Our team of wheel wizards lace, tension and tape every Proterra with the same attention to detail they provide their own wheels. This hands-on approach allows us to confidently stand behind our wheels as the most reliable on the market.

Features

Frequency Hub

Frequency hubs feature a low-drag, 6-pawl design that alternates contact between two sets of 3-pawl groupings to provide a responsive 5 degrees of freehub engagement.

Solid Strip & TCS Tape

3-Cross Lacing and Alloy Nipples

27mm inner rim width

Hand-Built in California

Technology

TCS (Tubeless Compatible System) is our industry-leading tubeless rim/tire system designed to international ETRTO and ISO standards.

6069 is the perfect aluminum alloy for bicycle rims due to its high tensile and fatigue strength, minimal weight, and excellent anti-corrosion properties.

Spoke holes are drilled at an angle to match the natural spoke path between a rim and hub. Eliminates binding and lateral loading of the nipples to increase wheel durability.

Rim ends are hydraulically pressed over an extruded aluminum insert that matches the inner cavity of the rim and is further reinforced by industrial epoxy.

Installed between the rim and tubeless tape to prevent tape from sagging at each spoke hole and make tire inflation easier while also preventing puncture from a broken spoke.

Sloped rim valley allows the bead of the tire to easily and smoothly move into place during installation and inflation.

Internationally standardized to ensure rim and tire compatibility are as consistent and user-friendly as possible for both WTB’s products and those of our competitors.

Freehub ratchet system quickly alternates between two groups of three pawls each to provide quick engagement and trusted durability.

Specs

SPECIFICATIONS: (Max spoke tension range: 110-120KgF)

Product	Wheel Diameter	Position	Spacing	Spoke Holes	Driver Body	Rotor Mount	Inner Rim Width	Rim ERD*	Weight**	Max Rider Weight	Part Number
Proterra Light i27 x 29 wheel, 110 x 15mm, 32h, 6-bolt, DB	29"	Front	15x110mm	32-hole	n/a	6-bolt	27mm	606	892g	265lbs	W045-0218
Proterra Light i27 x 29 wheel, 148 x 12mm, 32h, 6-bolt, DB, SRAM XDR	29"	Rear	12x148mm	32-hole	SRAM XDR	6-bolt	27mm	606	1038g	265lbs	W045-0222
Proterra Light i27 x 29 wheel, 148 x 12mm, 32h, 6-bolt, DB, Shimano MS	29"	Rear	12x148mm	32-hole	Shimano Microspline	6-bolt	27mm	606	1038g	265lbs	W045-0223
Proterra Light i27 x 29 wheel, 148 x 12mm, 32h, 6-bolt, DB, Shimano HG	29"	Rear	12x148mm	32-hole	Shimano HG 11spd	6-bolt	27mm	606	1018g	265lbs	W045-0221
Proterra Light i27 x 29 wheel, 100 x 15mm, 32h, 6-bolt, DB	29"	Front	15x100mm	32-hole	n/a	6-bolt	27mm	606	867g	265lbs	W045-0217
Proterra Light i27 x 29 wheel, 142 x 12mm, 32h, 6-bolt, DB, SRAM XDR	29"	Rear	12x142mm	32-hole	SRAM XDR	6-bolt	27mm	606	1010g	265lbs	W045-0220
Proterra Light i27 x 29 wheel, 142 x 12mm, 32h, 6-bolt, DB, Shimano HG	29"	Rear	12x142mm	32-hole	Shimano HG 11spd	6-bolt	27mm	606	1014g	265lbs	W045-0219

*Proterra hub dimensions can be found on our Resources and User Manuals page.

**Proterra wheel weights include the Solid Strip, tubeless tape and valve installed on each wheel.

Frequently Asked Questions

HOW DOES RIM WIDTH AFFECT TIRE VOLUME AND PROFILE?

Wider rims will cause a tire to also have a wider width, with more air volume within the tire and a flatter tire tread profile than designed for. As a general rule of thumb, a 2mm increase or decrease of inner rim width will result in a tire section width increase or decrease of 1mm. For example, our Nano 40 tire has a tire section width of 40mm on a 21mm inner rim width, however it will have a tire section width of 41mm on a 23mm inner rim width.

WHAT WIDTH TCS TUBELESS TAPE FOR MY WHEELS?

All WTB wheels are sold with TCS Tubeless Tape preinstalled. If you need to replace it at any time, WTB recommends using tape that is 5mm wider than your inner rim width. For example, an i30 rim would require 35mm TCS Tubeless Tape.

WHICH LENGTH OF TCS TUBELESS VALVE FOR MY PROTERRA WHEELS?

All WTB alloy rims and wheels are best paired with a 34mm valve stem.

TCS (Tubeless Compatible System)

TCS is our standardized tubeless rim/tire system designed to meet international ETRTO standards and deliver unbeatable tubeless performance and reliability. TCS components reduce weight, increase traction, virtually eliminate flats and has established itself as the most dependable tubeless system available. Our TCS system includes tires, rims, tape, sealant and valves to provide a comprehensive package of unrivaled tubeless performance and reliability. Every Proterra wheel benefits from our TCS (Tubeless Compatible System) system and ships with the Solid Strip, TCS tubeless tape and black alloy valves already installed. This means all Proterra wheels are ready for tubeless tires and sealant right out of the box.

Dependable 6069 Alloy

Proterra rims are extruded from WTB’s premier 6069 aluminum alloy to optimize strength while a bead blast finish and durable water-transfer decals keep your wheels looking fresh. Our extensive testing shows other 6000-series alloy to be less ding-resistant, while stiffer 7000-series alloys result in a harsher ride feel and tend to increase pinch flats. All of this ensures WTB Proterra wheels provide the compliance you expect on the first ride and the longevity you demand for every ride that follows.

PRESS REVIEWS

"The perfect wheelset"

- Riding Gravel

"Hard to beat"

- Road Bike Action

Free shipping $100+

Excluding deliveries to Hawaii and Alaska.

30 Day Return Policy

Return any unused product for up to 30 days.

WARRANTY POLICY

We guarantee our products for at least two years.

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Proterra Light i27