SHIMANO Thumbies – Paul Component Engineering Skip to content
  • Shop
  • Story
  • Videos
  • Contact
  • The Real Deal
Account Cart: 0
Menu
  • Shop
  • Story
  • Videos
  • Contact
  • The Real Deal
Account Cart (0)
Shop | Components | Drivetrain | Shifting | SHIMANO Thumbies

Product Videos

Related Products

Related products

  • Canti Lever

    Canti Lever

    $108.00 – $255.00
    Select options
  • Microshift Thumbies

    Microshift Thumbies

    $76.00 – $197.50
    Select options
  • SRAM Thumbies

    SRAM Thumbies

    $71.50 – $197.50
    Select options

SHIMANO Thumbies

Do you miss thumb shifters? Converting a drop bar bike to flat bars? These easily transform bar-end (aka barcon or TT) shifters into thumb shifters. The shifters are not included, but are readily available in 8 through 11-speed versions, and many have an option for friction-shifting. Heck, these will work on any indexed Shimano bar-end shifter going all the way back to 6 speed!

$76.00 – $197.50

Clear

Technical Information

  • Material
    6061 Aluminum
  • Weight
    60g
  • Finish
    Anodized or Polished
  • Anodized Color
    Black or Silver
  • Clamp Size
    22.2mm and 31.8mm ↓

    22.2mm is equivalent to 7/8 inches, and is the diameter of most mountain bike handlebars. Many flat bars, risers and city bars have this diameter. It is measured at the end of the bar where grips and brake levers attach.

    31.8
    31.8mm is the clamp diameter of most handle bars and this size is designed for that section of a drop bar. The shifters are mounted on either side of the stem and are very easy and convenient to operate.

  • Compatible Shifters
    Shimano ↓

    Shimano bar end shifters work well with our Shimano style Thumbies. Many of their indexed downtube shifters will work as well, so long as they mount to a flat, not curved, shifter boss.

  • Additional Information
    Download

Product Story

Thumbies bring back the thumb shifting of old, and we think it makes shifting more precise and smoother. These feel much better in our opinion than trigger or twist shifters.

Thumbies have a hinged clamp for an easy installation and fit handlebars with a diameter of 22.2mm or 31.8mm. The 22.2 models fit mountain bike handlebars and the 31.8 mount to the stem clamp area of a drop bar. The clamp is raised up to give clearance for hydraulic brake levers.

They have a shifter mounting boss that fits Shimano bar end shifters and most Shimano downtube shifters, so long as they mount to a flat, not curved, shifter boss.

 

 

Stay in Touch

Our monthly email is an ongoing bike conversation for creative people who spend a lot of time in their garage.
Bike Camping Froggie Bottles are back! This time o Bike Camping Froggie Bottles are back! This time on toad-green BPA-Free Sustain (recycled) Nalgenes. Artwork by the homie @hurrydive 🐸 Live on the website now!
Introducing the BËP. It’s just a handlebar plug Introducing the BËP. It’s just a handlebar plug, right? Sure, but when the machinist bike nerds at PAUL start 
designing, prototyping, (obsessing), and testing a project, even a simple bar plug can end up at 
NASA-level standards of tolerance, function, and reliability. 
We think we’ve arrived at the highest quality handlebar plugs in the world. Cheap rubber and 
plastic construction were never good enough. 100% CNC machined aluminum expanding-
wedge construction means that once tightened properly, they’re NEVER falling out or coming 
loose.
 Available in every color of the rainbow on our website, or from your favorite bike shop, now!
If you don’t stop to party with us at our @losta If you don’t stop to party with us at our @lostandfoundbikeride aid station, you will be DISQUALIFIED! 🤣
New bike camping froggy shirts and they are SUPER New bike camping froggy shirts and they are SUPER soft high quality US made 100% cotton, garment-dyed using a vintage pigment-dye process, then printed using a water based ink, so even the the ink itself has a soft touch and is breathable. So stoked on this artwork by @hurrydive and this might be the nicest t-shirt we’ve ever used. 🤌
Since we’re bringing back framebuilding parts, w Since we’re bringing back framebuilding parts, we figured we may as well make another batch of Permanent Pivots. These elegant CNC machined stainless steel brake bosses allow you to remove the pivots from any PAUL rim brakes, and mount your brakes directly to the boss for a super clean, simple aesthetic. These have been very popular when framebuilders are designing a bike around Racer and Racer-M brakes, which would be locked into PAUL brakes anyways, but you can also use them for any of our Canti and V brakes. Available on the website now!
It’s been many years since we’ve offered these It’s been many years since we’ve offered these single-speed/track dropouts, but we now have a limited run of 100 pairs available for those of you building 10mm axle singlespeed/track frames. The knurled self-nesting adjusters and locknuts make it super easy to center your wheel and dial in chain tension, then put the wheel right back where it belongs after re-installing it. Available on our website now!
Paul Component Engineering
  • info@paulcomp.com
  • 530–345–4371
  • 11204 Midway
  • Chico, CA 95928
Support
  • Policies
  • Dealer Application
  • Support
  • Story
  • Say Hello
  • Newsletter
  • Gift Certificates
Follow Along
© 2025 — Have a nice ride.