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BOX Two Prime 9 Speed Derailleur, X-Wide Cage, Black
BOX Two Prime 9 Speed Derailleur, X-Wide Cage, Black

Prime 9 Technology for less derailleur travel and better chainline, less wear, and improved lifespan Box Two features: Tri-Pack limited slip … read more

$20 offretail $129.99 Ends 12/25! $109.99 + ships free

BuyBuyPART NUM 571632
Box One Stem Locks, 1-1/8", Black
Box One Stem Locks, 1-1/8", Black

Cold forged and fully CNC-machined from a number of high strength aluminum alloys, Box One Stem Locks offer peace of mind and a level of added … read more

5% offretail $39.99 Ends 12/25! $37.99 + ships free

BuyBuyPART NUM 136244
Box Three Air Flow Brake Pads, 70mm, Black/Gray
Box Three Air Flow Brake Pads, 70mm, Black/Gray

With a stiff, one-piece, co-molded design, B3 Air Flow Brake Shoes provide excellent stopping power and are the perfect choice for your next build … read more

your price $10.99

BuyBuyPART NUM 285906
Box Two Small Number Plate, Gun Metal
Box Two Small Number Plate, Gun Metal

Designed by the late Rich Lee for Box, the Box Two Number Plate features color-fast, 3D injection molding, making them some of the most intricate … read more

your price $19.99

BuyBuyPART NUM 849997
BOX Three Prime 9 Cassette - 9-Speed, 11-46t, Black
BOX Three Prime 9 Cassette - 9-Speed, 11-46t, Black

The Box Three Prime 9 cassette is a great all-around cassette option. All cogs are stamped from steel and subsequently, the larger ones are pinned to … read more

3% offretail $69.99 Ends 12/25! $67.99 + ships free

BuyBuyPART NUM 549106
Box One Prime 9 Chain, 9 Speed, 126L, DLC Black
Box One Prime 9 Chain, 9 Speed, 126L, DLC Black

Externally, Prime 9 chains have similar dimensions to existing 9 speed chains. This unique geometry allows for thicker side plates than 12 speed … read more

6% offretail $51.99 Ends 12/25! $48.99 + ships free

BuyBuyPART NUM 432997
BOX Four Cassette - 8-Speed, 11-42t, Black
BOX Four Cassette - 8-Speed, 11-42t, Black

The BOX Four cassette adapts our Prime 9 philosophy of durability, simplicity, and reliability at a great price point. All cogs are stamped from steel … read more

your price $49.99 + ships free

BuyBuyPART NUM 895399
BOX Two/Three Prime 9 X-Wide Single Shift E-Bike Group Set, Matte Black
BOX Two/Three Prime 9 X-Wide Single Shift E-Bike Group Set, Matte Black

Save a little cash with this Box Three cassette paired to the durable Box Two derailleur, shifter and chain Includes Box Three cassette … read more

$50 offretail $299.99 Ends 12/25! $249.99 + ships free

BuyBuyPART NUM 677762
BOX Four Single Shift Shifter - 8-Speed, Black
BOX Four Single Shift Shifter - 8-Speed, Black

The BOX Four 8-Speed Shifter takes advantage of the "less is more" drivetrain philosophy and exploits durability, simplicity, and reliability. … read more

your price $31.99

BuyBuyPART NUM 290270
BOX ONE Alloy Triple Taper Handlebar 31.8 x 6" Black
BOX ONE Alloy Triple Taper Handlebar 31.8 x 6" Black

Tapered and welded, alloy 31.8mm clamp BMX handlebar. Box One Alloy Triple Taper Handlebars are a great choice for up-and-coming BMX racers and diminutive … read more

10% offretail $79.99 your price $71.99

BuyBuyPART NUM 721402
Box Four 8S Wide Single E-Bike Group Set, Matte Black
Box Four 8S Wide Single E-Bike Group Set, Matte Black

Wide rangle 8 speed group based on the same simple principle of the Prime 9 groups Includes 8s single shift derailleur, trigger shifter … read more

$10 offretail $159.99 Ends 12/25! $149.99 + ships free

BuyBuyPART NUM 545816
Box One Cone Presta Valve Caps, Black
Box One Cone Presta Valve Caps, Black

CNC machined from 6061-T6 aluminum alloy, Box One Valve Caps add a touch of style to any bike Available in anodized red, blue and black with … read more

your price $7.99

BuyBuyPART NUM 662892
BOX One Alloy Triple Taper BMX Handlebar, Black
BOX One Alloy Triple Taper BMX Handlebar, Black

Introducing the world`s first tapered and welded, alloy 31.8mm clamp BMX handlebar Box One Alloy Triple Taper Handlebars are stiffer than … read more

your price $79.99

BuyBuyPART NUM 494226
BOX Two Prime 9 Rear Shifter, Multi Shift, Black
BOX Two Prime 9 Rear Shifter, Multi Shift, Black

Prime 9 Technology for greater simplicity and durability Available in single shift option for eMTB to keep the user from shifting multiple … read more

your price $59.99 + ships free

BuyBuyPART NUM 981758
BOX Two Prime 9 Rear Shifter, Single Shift, Black
BOX Two Prime 9 Rear Shifter, Single Shift, Black

Prime 9 Technology for greater simplicity and durability Available in single shift option for eMTB to keep the user from shifting multiple … read more

your price $44.99 + ships free

BuyBuyPART NUM 396353
BOX BoxTwo Stem Spacer Kit, 1-1/8" - Black
BOX BoxTwo Stem Spacer Kit, 1-1/8" - Black

Super light CNC machined 6061 aluminum spacers for fine-tuning stem height Includes one each 3, 5, 10mm spacers and two each 1mm spacers … read more

your price $9.99

BuyBuyPART NUM 388428
BOX Three Prime 9 X-Wide Single Shift eBike Groupset - Includes X-Wide Rear Derailleur, 11-50t Cassette, Single Shift Shifter, Prime 9 Chain
BOX Three Prime 9 X-Wide Single Shift eBike Groupset - Includes X-Wide Rear Derailleur, 11-50t Cassette, Single Shift Shifter, Prime 9 Chain

Box's Prime 9 Technology is a counter-intuitive philosophy based on the less is more theory. It embraces range without adding complexity. The outcome … read more

$21 offretail $209.99 Ends 12/25! $188.99 + ships free

BuyBuyPART NUM 158747
Box Two V-Brake, 108mm, Black
Box Two V-Brake, 108mm, Black

Cold forged, CNC machined 6061 T-6 Aluminum V-brakes 30mm of vertical brake pad alignment for ease of use and compatibility Improved … read more

your price $59.99

BuyBuyPART NUM 426287
BOX Three Prime 9 Speed Derailleur, X-Wide Cage, Black
BOX Three Prime 9 Speed Derailleur, X-Wide Cage, Black

Prime 9 Technology for less derailleur travel and better chainline, less wear, and improved lifespan Box Three features: Limited Slip Clutch … read more

13% offretail $77.99 Ends 12/25! $67.99 + ships free

BuyBuyPART NUM 665399
Box One Chain Tensioner 10mm x 2 Axle Hole, Black
Box One Chain Tensioner 10mm x 2 Axle Hole, Black

Box One Chain Tensioners are extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight A minimalist design … read more

your price $29.99 + ships free

BuyBuyPART NUM 155878

We define color as the main color of the item. It may have accents or highlights in other colors.

In Store products are available to view in our showroom. In Store orders usually ship the same or next business day.

These models are available for online purchasing and can be shipped directly to you.

The number of speeds should correspond to the number of cogs on the cassette.

Our Lowest Price - This product is ineligible for additional discounts or rebates.

This is the part number or identifier for this item from the manufacturer

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