FROG 78
This 26” wheel junior hybrid bike is a great multi-purpose bike suitable for juniors aged 13+ years old with a minimum inside leg of 78cm.
Wheel: 26” inch
- Lightweight but sturdy frame
- Tektro easy-reach brake lever
- Shimano rapid fire 8-speed gear shifter
- Patented Frog cranks for easier pedalling
- Quick release seat post for easy height adjustment
- Free 5 year warranty on frame and forks
Available colours: Neon Red, Neon Green, Dark Grey, Electric Blue
Approx Age | 13+ |
Available colours | Neon Red, Neon Green, Dark Grey, Team Sky Black |
Weight | 10.0 kg |
Wheel size | 26" (ETRTO/ISO 559) |
Frame | 6061 T6 heat treated, double butted aluminium alloy, seat tube 18" (465mm) |
Fork | 6061 T6 heat treated aluminium alloy |
Crank set / Chainring | Frog Bikes patented aluminium straight arm cranks with Frog Bikes double chain guard, 155mm, steel 34t chainring |
Bottom Bracket | Neco, square taper, 68/107.5, cartridge bearings |
Pedals | Frog Bikes eco-friendly rice husk composite pedal, w/reflectors, 9/16" |
Front Hub | Quando, aluminium, sealed hub, QR, 28 hole |
Rear Hub | Quando, aluminium, sealed hub, QR, 28 hole, Shimano type 8-speed free hub body |
Cassette | Shimano Altus, HG-31, 8-speed, 11-32t |
Rear Derailleur | Shimano Altus, M310, 8-speed |
Chain | KMC, 8-speed |
Rim | Aluminium, 26x1.5, double wall, machined braking surface |
Seat post | Aluminium, micro adjust, 27.2mm |
Seat clamp | Aluminium, QR |
Headset | Neco, 1"1/8 semi-integrated threadless, aluminium Frog Bikes top cap |
Handlebar | Aluminium, straight, 540mm |
Stem | Aluminium, 1"1/8, 60mm, 4 bolt clamp |
Grips | Soft rubber grip with lock ring, 30mm OD |
Gear Shifter | Shimano Alivio, M360, 8-speed, rapid fire |
Brake Levers | Frog Bikes’ designed Tektro easy reach brake lever |
Brakes (F+R) | Tektro 836AL, aluminium, linear pull |
Saddle | Frog Bikes junior specific saddle (medium), w/ steel rails |
Tyres Primary | Kenda K154, 26x1.5, hybrid, (ETRTO/ISO 40-559) |
Tyres Secondary | Kenda K1153, 26x1.75, MTB, (ETRTO/ISO 47-559) |
Mudguards | Full length, resin, black |
Accessories box | Bell, bike reflectors white/red, wheel reflectors orange/white, frame protector patches |
In contrast to many kids' bikes, Frog bikes are sized by the leg length rather than age, as this is the most reliable way of getting the right size of bike for each child. Age alone isn’t a reliable measure as there is a large spread of “normal” leg lengths & heights for each age.
Please take the time to measure the rider’s inside leg.
It’s easy to measure:
- Stand the child in socks against a wall
- Place a small book between their legs, as high as is comfortable
- Ask the child to move away and measure from the top of the book to the floor.
Once you have measured the inside leg, use this table to find the right size of bike for your child. Note we give the MINIMUM inside leg length for each bike, with the saddle at its lowest setting. At this height, the child will safely and comfortably be able to get their feet on the ground. Don’t worry - Frog Bikes have long seat posts, so the saddle can be raised a long way as the rider grows.
We recommend that you go to a local store who will have many of our bikes available so the rider can sit on a bike. You will get help and advice on sizing, and get on-going service, as well as support.
PLEASE NOTE we always recommend that you buy your Frog bike from your local Frog store, who will build it for you and ensure the fit is right for your child. Our bikes should always be built and checked by a qualified mechanic.
Minimum inside leg in cm (in) | Approx age | Wheel Size | Frame Size | |
Tadpole Mini | 24cm | 1-2 | 10" | |
Tadpole | 31cm (12") | 2-3 | 12" | |
Tadpole Plus | 38cm (15") | 3-4 | 14" | |
Frog 43 | 43cm (17") | 3-4 | 14" | 9" |
Frog 48 | 48cm (19") | 4-5 | 16" | 9.5" |
Frog 52s | 52cm | 5-6 | 20" | 10" |
Frog 52 | 52cm (20") | 5-6 | 20" | 10" |
Frog 55 | 55cm (22") | 6-7 | 20" | 11" |
Frog 62 | 62cm (24") | 8-10 | 24" | 12" |
Frog 69 | 69cm (27") | 10-12 | 26" | 14" |
Frog 73 | 73cm (29") | 12-14 | 26" | 16" |
Frog 78 | 78cm (31") | 13+ | 26" | 18" |
Frog Road/Track 58 | 58cm (23") | 6-7 | 20" | 11" |
Frog Road/Track 67 | 67cm (26") | 8-12 | 24" | 14" |
Frog Road/Track 70 | 70cm (27") | 11-14 | 26" | 17" |
Frog MTB 62 | 62cm (24") | 8-10 | 24" | 12.5" |
Frog MTB 69 | 69cm (27") | 10-12 | 26" | 15" |
Frog MTB 72 | 72cm (28") | 13+ | 26" | 16" |
Of course all children have different length arms and torsos too, so to ensure a comfortable riding position, the handlebar height can be tailored, and saddles can be slid backwards and forwards on their rails. (These adjustments are easy to do and just need an allen key; instructions are in the manual).