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    Flat Harry's Cyclery
    31 High Street, Cookham, Maidenhead, SL6 9SJ. View the map
  • Who are we?

    A bit about us

    Flat Harry's mission is to be the best local bike shop in the Thames Valley area, our customer base is broad, attracting cyclists from all the towns and villages around Cookham; in a radius around us that passes through Lane End, High Wycombe and Beaconsfield, onto the Chalfonts, Gerrards Cross, Uxbridge, Windsor and Eton, through Taplow, Maidenhead, Bray and Holyport, and over to Marlow and Henley, our customers are happy to travel to find us, knowing we cater for every and any cyclist. We're mad about cycling and love it when anyone shares our enthusiasm, be they an aspiring fan of the sport, a tech hungry hard rider spinning their best speed machine, a thrill hungry mud lover, a hardened commuter battling the traffic, or a leisurely rider on a modest budget looking to have fun and relax on their bike.

    Whether it's serving coffee and flapjack on the mid-ride break, fixing your tusty steed, performing a bike-fitting or providing you with the right gear for your ride, we do it all and a lot more at Flat Harry's. We are proudly independent and thus only stock parts and brands that we are passionately proud of, and believe are the most suited for cyclists coping with the flint strewn roads and trails in our area.

    Our obsessive temperament, collective knowledge, engineering expertise, focus on quality and debunking of fads are what distinguish our shop, and make our customers return time and time again. Building trusting long term relationships with our customers is really important to us. Simply put, we want to be the place you trust above all others to do the right thing for you. Some folk might try and take advantage of our good nature, but we believe what goes around comes around and we want you to value our approach.

    Read more about us...
  • Key Information!

  • 2018 Whyte 403 Lime

    Durable and low maintenance this bike is great for young riders who want to get a taste of proper mountain biking. Designed with the same innovations as Whyte's top bikes, the 403 is a very capable and fun machine.


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    Other items in the range

    2018 Whyte 403 Lime Video


    With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

    You Pre-Order is prioritised (at no additional charge); meaning that, as soon as the product arrives with us, we can wrap it straight back up and get it sent out to you - it often never even hits the stock room shelves!


    With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

    So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

    Estimated Delivery Dates

    Estimated Delivery Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

    The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery Dates provided on product pages.

    The Current Estimated Delivery Dates for 2018 Whyte 403 Lime is

    2018 Whyte 403 Lime Description

  • Brand : Whyte
  • Season : 2018
  • Code : W18403
  • Weight : 0KG
  • Whyte's 400 series sets out to provide serious bikes for younger riders, developed with the same technological innovation as their adult range. The choice of 26” wheels may seem large for a kids bike but a low bottom bracket keeps the standover height reasonable meaning there's no downside to the larger wheel choice. The upside of larger wheels is lower rolling resistance and greater surface area, when compared to 24” wheels, for improved conservation of momentum and handling. The 400 series 6061 hyrdo formed T6 aluminium frame is as much a product of Whyte's ideology on mountain bike frame geometry as all their top Works bikes. The front wheel of the bike is pushed out, for greater stability and self-correcting ability and the low bottom bracket results in a low centre of gravity for even more stability. Keen to not impede the ability for sharp turning, Whyte echo the design of their top bikes, with a wider than average handlebar, so that even small arms can generate a lot of leverage and whip the front wheel around when it counts. The back of the bike is very compact so it can be brought around nice and easily too. Just like any of their adult bikes Whyte design the 400 series frame with their BBX internal cabling system designed to weather proof cables and make them easy to manage. The seatpost comes with Whyte's “Get a Grip” clamp system, a weather-proofed quick release clamp designed to make it easier to change the position of the seatpost quickly and securely, even with small hands. Whyte's philosophy is just because its for kids, it doesn't mean it shouldn't be every bit as good as one of their adult bikes.

    It's not just the frame that makes these bikes so good for younger riders. The 403's Suntour XCR 100mm travel fork will really boost the riders confidence, giving great control and quieting trails down to allow the freedom to have fun and explore. WTB front and rear specific tyres, help to make the most of the geometry and suspension, with great grip a pre-requisite for the predictable handling all mountain bikes desire. Emulating all of Whyte's top bikes, Whyte kit the 403 with single chainring (SCR) drive. This keeps the 403 sweetly simple, with one less dérailleur and shifter for reductions in weight and maintenance, both greatly desirable on a kids bike. The 403 comes with a 28 tooth chainring and a 9speed 11-40 cassette, offering a great range of gears, for all the drive needed to get up hills and an equally generous top gear for when they want to stretch their legs. The 403 uses a Shimano Altus trigger shifter, the same style as found on their adult bikes, making the eventual transition onto bigger things feel more natural. Safety is of course paramount and Whyte provide excellent Promax Solve 160mm rotor hydraulic disc brakes for ample braking control and stopping power. It may be targeted at a younger audience but the 403 is a proper bit of kit designed to enable kids to have proper off-road experiences. Whyte have produced a bike simple, capable and fun in equal measure. 

    Buyers Guide

    Sizing Information

    Technical Information


    Matt Lime with Eucalyptus/Olive


    6061 Hydro Formed T6 Aluminium, Multi Butted, SCR, Internal Cable Routing with BBX, Chainstay Post Mount Dropouts and Get A Grip Seat Clamp System


    Suntour, XCR, 100mm Travel, 32mm, HYDRO Lock-out, Air Spring, Adjustable Rebound, Post Mount

    Rear Shock



    FSA No.10, Semi Integrated, Caged Bearings

    Rear Hub

    Alloy, Cup & Cone, Double Seal, 28 Hole

    Front Hub

    Alloy, Cup & Cone, Double Seal, 28 Hole


    2.0mm, Black Stainless with Brass Nipples


    Whyte Trail-403, 28 Hole


    WTB Bronson Race, 26" X 2.1" Front, WTB Riddler, 26" X 1.95" Rear

    Shift Levers

    Shimano Altus SL-M310, 9 Speed Trigger Shifter

    Front Mech


    Rear Mech

    Shimano Altus RD-M2000-SGS, 9 Speed


    Sunrace 9 Speed, ED Black 11-40T


    KMC, 9 Speed


    28T Narrow/Wide Chainring, 165mm Crank Length

    Bottom Bracket

    JIS Square Interface, BB-7420ST, Cartridge Bearings


    Whyte 20mm Offset, 30.9mm x 300mm, 6061 Alloy, 2 Bolt Clamp


    Whyte Custom


    Whyte Riser Bar 30mm Rise DB, 31.8mm, 640mm Wide


    Whyte Custom, 45mm S, M, 60mm L & XL


    Whyte Lock-on V Grip

    Front Brakes

    Promax Solve, 160mm Rotor

    Rear Brakes

    Promax Solve, 160mm Rotor, Internal Routing

    Brake Levers

    Promax Solve, Short Reach


    Fibre Reinforced Composite Platform






    Click & Collect Buy the 2018 Whyte 403 Lime online & from us and will build
    your bike so it's ready to ride. We'll let you know when your new bike is ready to collect!

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    • 2018 Whyte 403 Lime
    • £599.00
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