Skip to content
  • 🎁 Find the perfect gift with our 🎁Gift collection🎁 and snap sales!🎁
  • 🎁 Find the perfect gift with our 🎁Gift collection🎁 and snap sales!🎁
Best Bike ShopBest Bike Shop
  • Components
    • Finishing Kit
    • Frame Spares
    • Brakes
    • Forks
    • Tyres
  • Christmas Deals
    • X-Mas Gifting
    • Outlet
    • Christmas Deals
    • Clearance Bikes
  • Bikes
    • SRAM
    • SRAM AXS
    • View all
    • Shimano New
    • Cyclocross
  • Road
    • Type
    • Road Clothing
    • Model
  • Gravel
    • Gravel Tyres
  • Frames
    • Mountain Bike Frames
    • Road Frames
    • Gravel Frames
  • Clothing
    • Clothing
    • Footwear
    • Discipline
  • Accessories
    • Maintenance
    • Bags & Luggage
  • New Release
    • No products in the basket.

      Return to shop

  • Basket

    No products in the basket.

    Return to shop

 

On-One Doofer Singlespeed Chain Tensioner

Home / Components / Frame Spares / View All
Sale!
On-One Doofer Singlespeed Chain Tensioner
On-One Doofer Singlespeed Chain Tensioner - Image 2
On-One Doofer Singlespeed Chain Tensioner - Image 3
On-One Doofer Singlespeed Chain Tensioner - Image 4
On-One Doofer Singlespeed Chain Tensioner -Best Bike Shop FSOOSSD P2
On-One Doofer Singlespeed Chain Tensioner -Best Bike Shop FSOOSSD P1 2dcac9da 7653 4e46 ac46 36b0054f1caf
On-One Doofer Singlespeed Chain Tensioner -Best Bike Shop FSOOSSD P2 5978c2b5 075d 43ff ac2f cd222a3e12f2

£14.10 Original price was: £14.10.£9.87Current price is: £9.87.

Buy Now
SKU: CGXHB 8249034473702 Categories: Components, Frame Spares, View All Tag: ForSale
  • Get the Best for Less
  • Shop with confidence, we guarantee quality.
  • The Quality Choice for Smart Shoppers
  • The home of quality products.
Browse
  • Accessories
    • Bags & Luggage
      • Bikepacking
    • Maintenance
      • Spares
      • Tool Kits
      • Tools
      • View All
  • Bikes
    • Cyclocross
    • Shimano New
    • SRAM
    • SRAM AXS
    • View all
  • Christmas Deals
    • Christmas Deals
    • Clearance Bikes
      • Bikes on Sale
      • Clearance Gravel bikes
      • Clearance Mountain Bikes
    • Outlet
      • Accessories Outlet
      • Clothing Outlet
      • Components Outlet
      • Helmets Outlet
    • X-Mas Gifting
      • ? Bikes in time for Christmas
      • ? For Her
      • ? For Him
      • ? For the Clean Freak
      • ? For the Outdoors-y type
      • ? Gifts under £10
      • ? Gifts under £50
  • Clothing
    • Clothing
      • Gloves
      • Jackets & Vests
    • Discipline
      • Gravel
      • Road
    • Footwear
      • Road Shoes
      • Socks
  • Components
    • Brakes
      • Brake Spares
    • Finishing Kit
      • Headsets
      • Pedals
      • Saddles
      • Seatposts
      • Stems
    • Forks
      • View All
    • Frame Spares
      • Derailleur Hangers
      • View All
    • Tyres
      • Inner Tubes
  • Frames
    • Gravel Frames
      • Titanium Gravel Bike Frames
    • Mountain Bike Frames
      • Steel MTB Frames
      • Titanium MTB Frames
    • Road Frames
      • Carbon Road Frames
      • Titanium Road Frames
  • Gravel
    • Gravel Tyres
      • Gravel Tyres
  • Road
    • Model
      • Pro Carbon
    • Road Clothing
    • Type
      • Commuter
  • Description
  • Reviews (0)

The simple way to turn a geared frame into a singlespeed.

Got a geared bike that you want to run as a singlespeed? Decided your commuting bike needs the fuss-free reliability of hub gears? The On-One Doofer chain tensioner takes up the slack with a simple sprung arm and jockey wheel. Screws into the gear hanger. Adjustable side-to-side for chain position.

Reviews

There are no reviews yet.

Be the first to review “On-One Doofer Singlespeed Chain Tensioner” Cancel reply

Related products

Sale!
SRAM Cassette PG-1230 NX Eagle / 11-50 / 12 Speed
Quick View

Components

SRAM Cassette PG-1230 NX Eagle / 11-50 / 12 Speed

£59.76 Original price was: £59.76.£41.83Current price is: £41.83.
Sale!
Selcof 380 Carbon Disc Fork / 12mm Thru / 1/18th - 1.5 Tapered
Quick View

Components

Selcof 380 Carbon Disc Fork / 12mm Thru / 1/18th – 1.5 Tapered

£182.59 Original price was: £182.59.£95.99Current price is: £95.99.
Sale!
KMC X11R 11 Speed Chain / 114 / Grey
Quick View

Components

KMC X11R 11 Speed Chain / 114 / Grey

£16.59 Original price was: £16.59.£11.61Current price is: £11.61.
Sale!
Titus Goldrush Replaceable Sliding Dropouts
Quick View

Components

Titus Goldrush Replaceable Sliding Dropouts

£23.23 Original price was: £23.23.£16.26Current price is: £16.26.
Sale!
Internal Cable Stop / On-One Scandal
Quick View

Components

Internal Cable Stop / On-One Scandal

£12.00 Original price was: £12.00.£8.40Current price is: £8.40.
Sale!
Replacement Rear Mech Hanger For Titanium Frame Models
Quick View

Components

Replacement Rear Mech Hanger For Titanium Frame Models

£20.74 Original price was: £20.74.£14.52Current price is: £14.52.
Sale!
Vavert 27.5" Inner Tube
Quick View

Components

Vavert 27.5″ Inner Tube

£12.00 Original price was: £12.00.£8.40Current price is: £8.40.
Sale!
Jobsworth Racing Extralight Adjustable Cartridge Style Brake Shoes Shimano And SRAM
Quick View

Brake Spares

Jobsworth Racing Extralight Adjustable Cartridge Style Brake Shoes Shimano And SRAM

£12.00 Original price was: £12.00.£8.40Current price is: £8.40.
MY ACCOUNT
  • My account
  • Wishlist
  • Checkout
  • Cart
ABOUT US
  • About Us
  • Returns & Exchanges
  • Delivery
  • FAQ
  • Contact Us
LEGAL
  • Privacy Policy
  • Shipping & Returns
  • Payment Method
  • Term and Conditions
Signup for Newsletter

Sign up for exclusive offers, original stories, events and more.

[contact-form-7 id="15"]
Copyright 2026 © www.planetxuk.com
  • Components
    • Finishing Kit
    • Frame Spares
    • Brakes
    • Forks
    • Tyres
  • Christmas Deals
    • X-Mas Gifting
    • Outlet
    • Christmas Deals
    • Clearance Bikes
  • Bikes
    • SRAM
    • SRAM AXS
    • View all
    • Shimano New
    • Cyclocross
  • Road
    • Type
    • Road Clothing
    • Model
  • Gravel
    • Gravel Tyres
  • Frames
    • Mountain Bike Frames
    • Road Frames
    • Gravel Frames
  • Clothing
    • Clothing
    • Footwear
    • Discipline
  • Accessories
    • Maintenance
    • Bags & Luggage
  • New Release
  • Login

Login

Lost your password?

Register

Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.