7/8″ Boxcar Stem – Paul Component Engineering Skip to content
  • Shop
  • Story
  • Videos
  • Contact
  • Newsletter
Account Cart: 0
Menu
  • Shop
  • Story
  • Videos
  • Contact
  • Newsletter
Account Cart (0)
Shop | Components | Cockpit | 7/8″ Boxcar Stem

Product Videos

Related Products

Related products

  • 4NM Torque Wrench

    $22.95
    Add to cart
  • Paul Barbarian

    $26.00
    Select options
  • Tall and Handsome

    $205.00 – $225.00
    Select options

7/8″ Boxcar Stem

Our popular Boxcar Stem but with a 7/8″ handlebar clamp diameter in 50mm or 35mm length, in 0 degree rise. These are great for any handlebar with a 22.2mm (AKA 7/8″) clamp diameter. This stem is the perfect combination of stiffness, strength and light weight. All screws are high strength stainless steel with the popular T25 head. Made in Chico, California with 2024 American aerospace alloy.

$147.50 – $166.50

Clear

Technical Information

  • Weight
    174g. including hardware
  • Material
    American 2024 Aerospace Aluminum
  • Finish
    Anodized or Polished
  • Anodized Color
    Black, Silver, & Purple
  • Bar Clamp Diameter
    7/8" (22.2mm)
  • Length
    35mm or 50mm
  • Stem Angle (deg)
    +/- 0
  • S.H.I.S. Steerer Clamp Diameter
    28.6 mm
  • Stack Height
    36 mm
  • Instructions
    Download
  • Torque Settings
    Steerer Tube: 5nm
    Faceplate: 4nm
  • Rise & Reach
    Download

Product Story

This stem was designed from the ground up to be stiff, strong and very light. We went through several design iterations and believe we’ve reached the best combination of these three principles. Extensive real world and machine testing have proven this to be one strong stem.

With respect to torsion, the rounded box shape is some 25% stiffer than the competition. As for strength, we ran it through 1,000,000 cycles of above normal use stress without a single problem. How’d we get it so light, while still being so strong? We started with obsessive computer design time, then took the highest quality American 2024 aerospace alloy, and precision machined it to .002” tolerance (that’s really tight for a stem). We use over 20 different end mills, drills, saws and taps to make 1 stem.

This limited edition 7/8″ batch comes in a zero rise in 35mm or 50mm length. All screws are the same pan head T25 Torx type screws in stainless steel. Why Torx? To encourage torque wrench usage and avoid strippage (People tend to overtighten faceplate bolts). Also the Torx head is wider, distributing stress better, and are the same wrench size as the ubiquitous rotor screws all makers use. Also SRAM has made a switch to T25 screw heads in almost all their products, which is a good sign.

As usual, by letting the function and material properties dictate the shape of the product, we have come up with another one of our often complimented and purposeful designs. Yes, it looks a little different, but with us there is always one good reason for this: to make it work as awesome as possible.

Stay in Touch

Our monthly email is an ongoing bike conversation for creative people who spend a lot of time in their garage.
Can we take a minute to just appreciate @l__ermita Can we take a minute to just appreciate @l__ermitage of @studiofolk? Best art vibe, am I right?!
Did you know we chamfer the back of every spoke ho Did you know we chamfer the back of every spoke hole of every hub we make, by hand? This (along with our canted flanges) reduces stress on the head and elbow of the spoke, and is one of many details that make these high flange hubs a ⚡️CULT CLASSIC⚡️.
We've had a few people ask for a PAUL quality-leve We've had a few people ask for a PAUL quality-level Post-Mount caliper to Flat-Mount fork adapter, so here ya go!
🍒We think these @foragercycles reusable cable t 🍒We think these @foragercycles reusable cable tips work so great and look so good with all of our brakes, we figured we should keep some in stock as an add-on. These little puppies are machined in Washington and come in various anodized colors, or natural brass. Sold as a pair of 2. Forager rocks!🍒
Maybe we’re biased, but our pewter parts look pr Maybe we’re biased, but our pewter parts look preeeeeetty nice on this @revelbikes dream build!😍That @huntercycles Smooth Move handlebar too… 
  Wait, Bikepacking.com are giving this bike away to a lucky member?!:
“Support Bikepacking.com and get entered to win this brand new Revel Wayward dream build, complete with a suite of Pewter PAUL parts. Bikepacking.com has been at the forefront of building the bikepacking community for more than a decade, sharing in-depth reviews and guides, inspiring stories, up-to-the-minute reportage, and creating a first-of-its-kind bikepacking route network that now spans 100,000+ miles. Join the Bikepacking Collective today to help them sustain the platform and have a chance to win one hell of a machine. Learn all about the build, see a full gallery, and become a member over at the @bikepackingcom website.” Heck yeah, we can’t wait to see who wins this! 🔥🎲🔥
Is there something in the water in Chico?! We’re Is there something in the water in Chico?! We’re SO proud of our buddy Tyler of BTCHN Bikes… DID YOU SEE all the crazy stuff he brought to the @made.bike show?! Dude blew our minds with his ti frame and ti seatposts and carbon fenders and THESE ti bars: 3D printed and custom welded and anodized in Chico to your size by pre-order until the 17th of this month. 🔥🤯🔥 Head over to @btchn.bikes to learn more. 
📷: @johnprolly
Paul Component Engineering
  • info@paulcomp.com
  • 530–345–4371
  • 11204 Midway
  • Chico, CA 95928
Support
  • Policies
  • Dealer Application
  • Support
  • Story
  • Say Hello
  • Gift Certificates
Follow Along
© 2023 — Have a nice ride.