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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.

To view our full range visit our road bikes category.

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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

4.6 / 5

13 reviews

12 people recommend this product

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Excellent commuter

Carbon forks, Shimano Sora gearset, lightweight

Front mech difficult to set up, brakes average


  (United Kingdom)

40-49 years old    Man

4 5

used for 2 to 8 weeks After 8 weeks of solid commuting I'm more than happy with this bike. The carbon forks take an amazing amount of chatter out of the ride, and it feels light and responsive. I've ridden old steel frames all my life so this feels like a totally different beast, and I now wish I'd made the leap to a more expensive bike years ago. Only negatives; brakes are fairly average and the front mech caused me issues, with a slipped cable that I managed to snap after I had to adjust it mid ride. I took it back to the Coventry store and they sorted that out for me without any fuss though, so really good customer service from your mechanic.

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

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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