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Frog 58 Kids Road Bike - 20 Inch


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Product Details

Frog Road 58

The Frog Road 58 is a superb first 20-inch-wheel road bike for youngsters as young as 6-7 years old. '58' means this bike fits youngsters with a 58cm / 23-inch (or longer) inside leg measurement.

It even comes supplied with a second set of slightly wider cross tyres so you can quickly convert the Frog Road 58 into a cyclocross bike.

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Key Features

  • Lightweight aluminium alloy frame (11 inch seat tube) and fork.
  • Quick release (no need to carry a spanner to change a tube) aluminium wheels.
  • The Prowheel alloy cranks are a child-friendly short (114mm) length with 34t chainring.
  • Child friendly 32cm-wide short-drop alloy handlebars.
  • 'Short drop' means a shorter distance between the bar tops and the drops than you'd find with adult drop bars to make it easier for the young rider to switch hand position.
  • Minimum recommended inside leg measurement to the floor: 58cm.
  • Minimum recommended child height: 122cm.
  • Approximate age range: from 6/7 to 9/10 year old.
  • Manufacturer's published weight: 8.2kg.

Frog Bike Sizing
Another example of Frog's original approach: rather than naming their kids' bikes by wheel size, Frog size their bikes by inside leg measurement. Hence the Frog Road 58 is recommended for children with a minimum inside leg measurement of 58cm (23 inches). This corresponds with other manufacturers' 20 inch wheel kids' bikes, so the Frog 58 would make a great present for children from 6/7 year olds. It comes with a long aluminium seatpost with a quick release seat binder to make it easy to adjust the saddle as the child grows all the way up to 8, 9 or 10 years old.

Frog Video
Frog's passion for making better bikes for kids shines through in this video.

Why this bike is great

Lightweight alloy frame
Like most better-quality adult bikes, Frog bikes are built with aluminium frames and (mostly) aluminium parts to keep the weight to a minimum to help ensure your child enjoys the best possible introduction to biking.

Lightweight alloy components
Sure, more and more companies are making kids' bikes with alloy (rather than heavier steel) frames and alloy wheel rims. This Frog bike stands out for coming equipped with all-aluminium alloy forks, hubs, crankset, brakes, brake levers, handlebars and seatpost to keep the bike's weight to a minimum.

High quality Microshift brake/gear shifters
To make the bike suitable for gradients it comes with 9-speed gears via its Microshift gear shifter, Microshift derailleur and Shimano 9-speed cassette. To make it simpler for youngsters, it comes with just one shifter, one chainring and one derailleur. The Microshift shifter is integrated with the right-hand brake lever in a Shimano STI dual control style. Simply nudge the silver brake lever inwards to shift into a lower gear, or click the black return lever inwards to shift to a higher gear.

It's worth pointing out that opting for Microshift over a Shimano shifter was not a cheap option. Frog spec'd this shifter (which retails for over £100) because it's at least as good as Shimano Claris in quality, and because it has the shortest-reach brake lever (measured from lever blade to handlebar) and the shortest gear change 'sweep', making it the best dual control shifter on the market for riders with smaller hands.

Two pairs of brake levers
The Tektro Oryx cantilever brakes (which we have seen gracing £1,000 adult cross bikes and touring bikes) can be applied from the Microshift child-friendly drop bar levers. The Frog Road 58 also comes with a set of Tektro auxiliary levers that enable the rider to pull the brakes when riding with their hands comfortably perched on the bar tops.

Frog drop handlebars
Frog couldn't find a suitable bar on the market, so they designed a unique bar that is the correct width, appropriate to a small rider's shoulder width, and with minimum drop to make it easier for the young rider to switch hand position.

Quick-release wheels
Another original detail rarely seen on kids' bikes is that the Frog Road 58 comes with lightweight alloy quick release wheels fitted with good quality Kenda 20 x 1 1/8th inch road tyres, making this bike capable of sprinting and accelerating - just like an adult road bike.

Also, with cyclocross conversion in mind, Frog have internally routed the rear brake cable inside the frame so the cable is out of the way when the rider shoulders the bike.

Shop All Frog Bikes >

Shop All Kids Bikes >

Frog Bikes Size Guide >

Technical Specifications

Fork20 Aluminium Alloy 6061 Fork
Frame280mm (11") Aluminium Alloy 6061
Chain WheelProwheel 34T. 114 mm Aluminium Alloy Crank with double chain guard
BrakesTektro Oryx (992AG) Aluminium Alloy Cantilever, black
HandlebarFrog Bikes special L:320mm Aluminium Alloy drop bar, black
Grip/tapeRacing tape with caps (supplied in box)
SaddleFrog Bikes racing saddle
Seat PostAluminium 250mm, black
PedalWellgo R090 Small
Front wheelDA-20, Aluminium Alloy double wall brushed silver, CNC, 20*1
Rear wheelDA-20,Aluminium Alloy double wall brushed silver, CNC ,20*1
HubsQuando Aluminium Alloy, black
Road tyresKenda K-1018 rubber 20*1 1/8 Black ETRTO:451MM
Auxillary brake leversTektro RL570
Left shifterMicroshift SBR492S black lever, black rubber hood
Right shifterMicroshift SBR492S 9 speed Jnr Rapidfire Plus, Alloy for canti/roller-brake, black
Front derailleurn/a
Rear derailleurMicroshift short cage RD-R42s, black
CasetteShimano 9 speed, 12-27T
ReflectorsWheels (both white and yellow included), front, rear
BellL/R handed


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.