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Aluminium, carbon fork, 27 speeds

All Bikes Cycling - Fit 500 Flat Bar Road Bike B'TWIN - Bikes
Reference : 8239798
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B'TWIN Fit 500 Flat Bar Road Bike

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The b'Twin Fit 500 Flat Bar Road Bike is perfect for commuting to work by bike, cycling around town or in the countryside. Sharing the same frame as the famous b'Twin Triban road bike, it offers superb value and quality. Shimano sora drivetrain and hutchinson equinox tyres. The frame is rear panier rack ready. Aluminium, carbon fork, 27 speeds.

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Product benefits

    • Power transmission / Propulsion
    • aluminium frame with carbon fork, very strong aluminium pivot
    • Ease of use
    • Shimano rapidfire derailleur shifters, precise and simple
    • Optimised posture
    • elevated bust thanks to the flat handlebar and raised stem
    • Lifetime warranty
    • B’TWIN guarantees the frame, stem, handlebar and rigid fork for life.
  1. Guarantee : lifetime warranty for: frame, stem and handlebar on this bike. Details on

Product information

10.2 kg in size 57
matt charcoal grey

your reviews

4.7 / 5

12 reviews

11 people recommend this product

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Up to date review

Quilty brakes, finishing kit, frame & forks

Poor gears, pedals, wheels & tyres


  (United Kingdom)

40-49 years old    Man

4 5

used for More than 1 year After 15 months of ride to work, I am happy owning this bike. Would I buy another, NO, as this bike is a road bike, turned into a hybrid bike and that means, its over geared , nervous steering, poor indexed gears, narrow tyres-lacked any wet weather grip and a rear wheel with a crossed up cassette thread(bad)

BTWIN Fit 500 flatbar road bike

smooth...great price..very light.



  (United Kingdom)

40-49 years old    Man

5 5

used for 1 week or less I actually purchased btwin triban SE road bike and took the bike home , after a having the bike for a night ..I felt uncomfortable and couldn't get used to the micro shift gears and went back to Braehead to see if they could exchange for Btwin fit 500 flat bar road bike. No problems.
After choosing my bike they went over it like a fine toothcomb. I took the bike home but didn't like the pedals.. so I changed them for a bigger pair ..they cost a tenner.. BRILL.. I took bike for a good run.. No complaints, very fast , smooth , light,
I couldn't thank the Decathlon staff at Braehead enough
They were fab.. they told me to bring the bike back in 3 months and they would service it..

Flat 5 bike

Really good bike



  (United Kingdom)

50-59 years old    Man

5 5

used for 3 to 6 months My first road bike and I love it

fit 5

quality ,lightness,value for money

nothing yet


  (United Kingdom)

40-49 years old    Man

5 5

used for 1 week or less bought the fit 5 through c2w scheme from bolton branch.great service from various members of staff on different visits/phone calls which is a nice change from some the bike but felt after a couple of days the frame a little small for me,after a phone call and visit to the bolton store they changed the bike for the next size.very happy so far ,love the speed and quality after being used to mtb for years.well done.

Response of the brand

Dear Sir,
Thank you for taking the time to post a review of the b'Twin Fit 500 Flat Bar Road Bike.
Your feedback is appreciated and I will forward it onto the Decathlon Bolton store team.
Peter Lazarus UK Market Manager DECATHLON

Pretty decent given the cost

Price, Handling, Comfortable.

Shifting the front rings, some punctures.


  (United Kingdom)

40-49 years old    Man

4 5

used for 7 to 12 months Great bike at the cost, but not absolutely perfect. I'm 40+ and wanted a bike for riding to work. Had this 6 months now and I am quite impressed. The main positives are the comfort, the general handling and the rapidfire shifters. The main negatives are setting up the gears - especially on the front rings, and I've had a couple of punctures so far and one spill in the wet - which may well have been my own fault! The flat bar will be a personal preference and I prefer it - a great stepping stone from a mountain bike to a road bike. I was tempted by the next model up, but can't imagine that it is fully worth the extra cost.

Response of the brand

Dear Sir,

Thank you very much for posting a review of your b'Twin Fit 500 flat bar road bike.  I'm pleased to read that you are happy with your bike.

If you are still encountering issues with your front mech, please don't hesitate to pop it down to your local Decathlon store workshop where one of our technicians can quickly adjust the gears to make sure that they're working smoothly.  Just give them a call to book it in.

Regarding your tyres, if you are commuting regularly it's really worth upgrading your tyres to a more durable and better performing tyre in the wet.  I would recommend the Vittoria Pro Tech 700 x 25 road bike tyre which offers exceptional performance and comfort at a great price.  This is the link:


Peter Lazarus UK Market Manager DECATHLON

Technical Information

  • 1

    Frame 6061 T6 aluminium sloping frame with integrated head tube. Short frame geometry, 1900 g in size 57, robust frame, available in 6 sizes for users with heights from 1.60m to 2.00m

  • 2

    Fork / Suspension carbon blade, aluminium steerer, 1"1/8 aheadset, thereby combining strength, lightness and precision.

  • 3

    Drivetrain Shifters: Shimano Deore Trigger shifters for easy, fast and precise gear changing. 27
    perfectly geared speeds to help cyclists of all levels find the right rhythm without too much effort. Front derailleur: Shimano SORA. Rear derailleur: Shimano SORA

  • 4

    Brakes Btwin double brake pivot with pads mounted on brake shoes to facilitate replacement when worn down without modifying the position of the brakes

  • 5

    Crankset / Cassette 9S 12 x 25 cassette; Bottom bracket: CF453 Shimano 50/39/30

  • 6

    Handlebar / stem / steering BTWIN MTB Flat 500 to 540 mm handlebar adapted to the size of the bike. Elevated stem: 10° (90 to 120 mm) for a more elevated position.

  • 7

    Wheels Btwin double-walled aluminium with reinforcement rings, 32 stainless spokes, front rear quick release

  • 8

    Saddle / seat post Btwin aluminium seat post, one Allen screw adjustment and a very comfortable Selle Royale saddle that is great for long rides.

  • 9

    Pedals Flat pedals with toe-clips

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