Chain Reaction Bicycles - Home

4231 Dundas Street West
Toronto, ON M8X 1Y3


Fall & Winter Hours

Mon-Tue 11am-7pm
Wed-Thu 11am-8pm
Friday 11am-7pm
Saturday 10am- 6pm
Sunday Closed



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Service and Repairs

Welcome to Our Service Department

What's the biggest reason you should purchase your next Bike from Chain Reaction?

One word... SERVICE

Since 1988, our highly skilled & experienced mechanics will repair and tune your bike to it's peak potential. We offer a wide range and well-stocked supply of spare parts; honest & responsive customer service.

Included with every bicycle purchased at Chain Reaction:

  • 1-year unlimited Pro Tune Up service

Our most popular service packages are listed below - if you have any questions or concerns come into the store, call or email us.

The Works - $650 +

Complete overhaul & cleaning plus new tires, new chain, disc or rim brake pads.

New gear and brake cables or disc brake bleed. New bar tape or grips

48hr. turn around (with appointment) Ask for more details

Your bike will perform like new again!

New Bike Feel $349.

Complete Overhaul & Cleaning

Includes new bar tape or grips, (Wired) gear and brake cables and Brake Pads

(Other parts not included, premium cables and brake pads are extra cost)

Annual Pro-Tune Plus - $139.99

Same as the Pro-Tune, and: 

  • Complete drive train cleaning 
  • Wipe down frame

Basic Pro-Tune - $89.99

Our all-round tune-up. Includes:

Complete safety check 

  • Wheel true 
  • Brake adjust (both rim or disc)
  • Gear adj
  • Lube drive train
  • Tighten all nuts and bolts
  • Bearing adjustments
  • Tire pressure check

Pro Bike Fit - $99.99 + HST

Included with purchase of Road & Gravel bikes

Our bike fit program takes your existing bike or a newly purchased Chain Reaction bike, and adjusts it to fit your body and desired position. A properly fitted bike the most important way to prevent knee & back pain, saddle discomfort, neck pain and optimize your performance.

Your Pro Bike Fitting takes the following into account:

  • Frame Size
  • Comfort Issues
  • Handlebar Position
  • Brake lever reach
  • Saddle Height, Angle and Position
  • Cockpit Reach, Stem Length and Angle
  • Cleat Alignment
  • Hip to Knee to Ankle Alignment

Pro Aero Fit - $139.99

Included with purchase of new TT or triathlon bike

Our aero fit program is similar to the Pro Bike fit service but with the addition of the installation and adjustment of aero bars. Aero bars are perfect for the multi-sport athlete or anyone interested in taking pressure off their hands and arms. 

Learn More about all our Fit Services

Bike Pack for Shipping - starting at $49.99

Serious cyclists can't travel without their baby.

We will carefully pack your bike in preparation for shipping. All packing materials included. 

Travel cases are also available for rent starting at $55./week or $95./two weeks.

Other Services

  • Tire or tube change - $20. (parts not included)
  • Wheel truing - $25 - $40.
  • Seasonal Bike Bath, $25 - $45.

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Fall & Winter Hours

Mon-Tue 11am-7pm
Wed-Thu 11am-8pm
Friday 11am-7pm
Saturday 10am-6pm
Sunday Closed