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    Home / Products / Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar
    Paul Components Boxcar Stem- 31.8mm Bar

    Paul Components designed their Boxcar Stem to be the perfect combination of stiffness, strength and reasonable weight. 

    Available in +/- 0 in 35, 50, 70 and 90mm. +/- 15 in 70 and 90mm and  +/- 7 in 100mm and 110mm. All bolts used in this stem are high strength stainless steel with the popular T25 head. The Boxcar stem is made in Chico, California using US sourced 2024 aircraft alloy. 

    Paul designed the Boxcar Stem from the ground up to be stiff, strong and as light as they could be. They went through several design cycles to achieve the best combination of these three principles. Extensive real world and machine testing and proven this to be one strong stem! To handle flex and torsion, the rounded box shape is about 25% stiffer than the competition. Also, Paul strength tested the Boxcar Stem by running it through 1,000,000 cycles of above normal use stress without a single problem. 

    The Paul Components Boxcar Stem comes in a zero rise and a +/- 15 degree rise. Lengths are 50, 70 and 90mm. All bolts are the same pan head T25 Torx type in stainless steel. Paul specifically chose Torx bolts because they work so well and are the same wrench size as the rotor screws/bolts that all brake manufacturers currently use. Even SRAM has made the switch to T25 screw heads in almost all of their products. 

    Paul's thoughtfulness of design created the Boxcar Stem by letting the function and material properties determine the shape of the product. Paul has come up with yet another one of their often complimented and purposeful designs. Sure it looks a little different, but with Paul there is always one good reason for this: to make it work as awesome as possible.

    Specifications

    Weight:
    35mm +/-0: 118 g
    50 mm +/- 0: 137 g
    70 mm +/- 0: 153 g
    90 mm +/- 0: 155 g
    70 mm +/- 15: 169 g
    90 mm +/- 15: 172 g
    100mm +/-7: 181g
    110mm +/-7: 203 g
    Material: 2024 Aluminum
    Finish: Anodized or Polished
    Anodized Color: Black, Purple or Silver
    Bar Clamp Diameter- 31.8 mm
    Lengths
    35mm
    50 mm
    70 mm
    90 mm
    100mm
    110mm
    Stem Angle (deg):
    +/- 0
    +/- 7
    +/- 15
    S.H.I.S. Stem Clamp Diameter: 28.6 mm
    Stack Height: 36 mm

    The Boxcar Stem from Paul Component Engineering on Vimeo.




    Paul Components designed their Boxcar Stem to be the perfect combination of stiffness, strength and reasonable weight. 

    Available in +/- 0 in 35, 50, 70 and 90mm. +/- 15 in 70 and 90mm and  +/- 7 in 100mm and 110mm. All bolts used in this stem are high strength stainless steel with the popular T25 head. The Boxcar stem is made in Chico, California using US sourced 2024 aircraft alloy. 

    Paul designed the Boxcar Stem from the ground up to be stiff, strong and as light as they could be. They went through several design cycles to achieve the best combination of these three principles. Extensive real world and machine testing and proven this to be one strong stem! To handle flex and torsion, the rounded box shape is about 25% stiffer than the competition. Also, Paul strength tested the Boxcar Stem by running it through 1,000,000 cycles of above normal use stress without a single problem. 

    The Paul Components Boxcar Stem comes in a zero rise and a +/- 15 degree rise. Lengths are 50, 70 and 90mm. All bolts are the same pan head T25 Torx type in stainless steel. Paul specifically chose Torx bolts because they work so well and are the same wrench size as the rotor screws/bolts that all brake manufacturers currently use. Even SRAM has made the switch to T25 screw heads in almost all of their products. 

    Paul's thoughtfulness of design created the Boxcar Stem by letting the function and material properties determine the shape of the product. Paul has come up with yet another one of their often complimented and purposeful designs. Sure it looks a little different, but with Paul there is always one good reason for this: to make it work as awesome as possible.

    Specifications

    Weight:
    35mm +/-0: 118 g
    50 mm +/- 0: 137 g
    70 mm +/- 0: 153 g
    90 mm +/- 0: 155 g
    70 mm +/- 15: 169 g
    90 mm +/- 15: 172 g
    100mm +/-7: 181g
    110mm +/-7: 203 g
    Material: 2024 Aluminum
    Finish: Anodized or Polished
    Anodized Color: Black, Purple or Silver
    Bar Clamp Diameter- 31.8 mm
    Lengths
    35mm
    50 mm
    70 mm
    90 mm
    100mm
    110mm
    Stem Angle (deg):
    +/- 0
    +/- 7
    +/- 15
    S.H.I.S. Stem Clamp Diameter: 28.6 mm
    Stack Height: 36 mm

    The Boxcar Stem from Paul Component Engineering on Vimeo.


    041SILVER01-1

    Paul Components Boxcar Stem- 31.8mm Bar


    $228.00 - $252.00

    Color
    Black
    Silver
    Polished
    Purple
    Pewter
    Length
    Stem Angle



    Availability and stock levels vary by color & specification, please check each color below for stock information.

    Paul Components designed their Boxcar Stem to be the perfect combination of stiffness, strength and reasonable weight. 

    Available in +/- 0 in 35, 50, 70 and 90mm. +/- 15 in 70 and 90mm and  +/- 7 in 100mm and 110mm. All bolts used in this stem are high strength stainless steel with the popular T25 head. The Boxcar stem is made in Chico, California using US sourced 2024 aircraft alloy. 

    Paul designed the Boxcar Stem from the ground up to be stiff, strong and as light as they could be. They went through several design cycles to achieve the best combination of these three principles. Extensive real world and machine testing and proven this to be one strong stem! To handle flex and torsion, the rounded box shape is about 25% stiffer than the competition. Also, Paul strength tested the Boxcar Stem by running it through 1,000,000 cycles of above normal use stress without a single problem. 

    The Paul Components Boxcar Stem comes in a zero rise and a +/- 15 degree rise. Lengths are 50, 70 and 90mm. All bolts are the same pan head T25 Torx type in stainless steel. Paul specifically chose Torx bolts because they work so well and are the same wrench size as the rotor screws/bolts that all brake manufacturers currently use. Even SRAM has made the switch to T25 screw heads in almost all of their products. 

    Paul's thoughtfulness of design created the Boxcar Stem by letting the function and material properties determine the shape of the product. Paul has come up with yet another one of their often complimented and purposeful designs. Sure it looks a little different, but with Paul there is always one good reason for this: to make it work as awesome as possible.

    Specifications

    Weight:
    35mm +/-0: 118 g
    50 mm +/- 0: 137 g
    70 mm +/- 0: 153 g
    90 mm +/- 0: 155 g
    70 mm +/- 15: 169 g
    90 mm +/- 15: 172 g
    100mm +/-7: 181g
    110mm +/-7: 203 g
    Material: 2024 Aluminum
    Finish: Anodized or Polished
    Anodized Color: Black, Purple or Silver
    Bar Clamp Diameter- 31.8 mm
    Lengths
    35mm
    50 mm
    70 mm
    90 mm
    100mm
    110mm
    Stem Angle (deg):
    +/- 0
    +/- 7
    +/- 15
    S.H.I.S. Stem Clamp Diameter: 28.6 mm
    Stack Height: 36 mm

    The Boxcar Stem from Paul Component Engineering on Vimeo.

    • AVT.Bike is an authorized Paul Components dealer and proud to carry one of the largest selections of Paul Components products available online and shipped anywhere in the world.
    • Paul Components are available in a range of colors which may vary by product so please consult the specific product page for details on available options.
    • Other colors and product options are available depending on stock levels, so if you don't see the color or exact product you are looking for please contact us.
    • If you have any technical questions at all on Paul Components products please contact us and we'll be pleased to help you out!
    • All Paul Components products are responsibly manufactured in Chico, California, USA.

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