Lightweight junior specific frame design Increased stability, better handling & more comfortable to ride
Lightweight oversize handlebar and stem Reduces flex resulting in better control
High quality KT machined hubs Increased performance and greater longevity
Junior specific suspension fork Enables optimal performance for lower weight riders
*PROTOTYPE. COLOURS ARE SUBJECT TO CHANGE. AVAILABLE EARLY 2018.
Frog MTB 72
Frog MTB 72 Frog MTB 72 Frog MTB 72 Frog MTB 72 Frog MTB 72 Frog MTB 72 Frog MTB 72 Frog MTB 72

Frog MTB 72

Colour

Please select an option above

Price

£610(excluding delivery)

Weight

11.5 kg

Quantity

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This 26” wheel junior mountain bike is the ideal multi terrain bicycle for off-road cycling and suitable for 13+ year olds with a minimum inside leg measure of 72cm.

Wheel: 26” inch

- Lightweight but sturdy frame
- Frog Bikes junior specific 26"air suspension fork with lockout and damping control
- Lightweight oversize handlebar and stem
- Easy-reach junior specific hydraulic brakes
- Shimano rapid-fire 9 speed shift lever
- Patented Frog cranks for easier pedalling
- Quick release seat post for easy height adjustment
- Kenda MTB tyres
- Free 5 year warranty on frame

Available colours: Metallic Grey & Neon Green OR Metallic Grey & Neon Red

Approx age 13+
Wheel size 26" (ETRTO/ISO 559)
Weight 11.5 kg
Available colours Metallic Grey & Neon Green OR Metallic Grey & Neon Red
Frame 6061 T6 heat treated, aluminium alloy, seat tube 16" (415mm)
Fork Frog Bikes junior specific 26" air suspension fork with lockout, damping and rebound control, 100mm travel
Crank set/ Chainring Frog Bikes patented aluminium straight arm cranks with double chain guard, 146mm, steel 32t chainring
Bottom Bracket Neco, square taper, 68/107.5, cartridge bearings
Pedals Frog Bikes eco-friendly rice husk & plastic composite, w/reflectors, 9/16"
Front Hub KT-SN3F, high performance aluminium disc hub, sealed cartridge bearings, QR, 24 hole, 6 bolt
Rear Hub KT-SN3F, high performance aluminium disc hub, sealed cartridge bearings, QR, 24 hole, 6 bolt
Cassette Shimano Alivio HG-400, 9-speed, 12-36t
Rear Derailleur Shimano Acera RD-M3000 Shadow RD, 9-speed
Chain KMC, 9-speed
Rim Aluminium, 26x1.5, double wall, disc-specific
Seat post Aluminium, micro adjust, 27.2mm
Seat clamp Aluminium, QR
Headset Neco, 1"1/8 semi-integrated threadless with sealed cartridge bearings, aluminium Frog Bikes top cap
Handlebar UNO, Aluminium Oversized, 580mm
Stem UNO, Aluminium, 1"1/8, 60mm, Oversized 4 bolt clamp
Grips Soft rubber grip with lock ring, 30mm OD
Gear Shifter Shimano Acera SLM3000 Rapidfire Shift 9 Speed Lever
Brake Levers Tektro HD-M286, junior specific 2 finger hydraulic disc brakes*
Brakes (F+R) Tektro hydraulic disc brakes, 160/140mm rotor
Saddle Frog Bikes junior specific slimline saddle (medium)
Tyres Primary Kenda K1153, 26x1.95, MTB, (ETRTO/ISO 50-559)
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:

  1. Stand the child in socks against a wall
  2. Place a small book between their legs, as high as is comfortable
  3. Ask the child to move away and measure from the top of the book to the floor.
How to size a child for bike

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).

BIKES

We have several delivery options for the bikes, depending on where you live and when you would like the bike.

Option 1. FREE to your local bike store (approx 1 week)

Option 2. £40 to whole of UK, excluding Channel Islands (approx 5 working days)

Option 3. £44.64 Mainland Europe, Azerbaijan, Bosnia Herzegovina, Canary Islands, Faroe Islands, Gibraltar (approx 10-13 days)

Option 4. £166.67 Hong Kong, Japan, Malaysia, Singapore, Thailand, UAE, China, India, Indonesia, Korea, Pakistan, Phillipines, Taiwan, Vietnam (approx 2-3 weeks)

Option 5. £189.39 Australia, Israel, New Zealand, Mexico, South Africa, Brazil, Egypt, Iraq, Morocco (approx 2-3 weeks)

Option 6. £208.33 Rest of world (approx 3 - 4 weeks)

ACCESSORIES

Accessories ordered on their own will be sent out using standard post, at a cost of £5.00 per order to UK, £10 per order overseas.

A Wheelbase (mm) 1100
B Seat tube angle (degrees) 74
C Head tube angle (degrees) 69.5
D Effective top tube (mm) 587
E Head tube length (mm) 110
F Chain stay length (mm) 435
G Seat tube length (mm) 415
H BB to Floor (mm) 295

Rider Weight Pressure
20-30 kgs (44-66 lbs) 20-30 PSI (1.38-2.07 BAR)
30-40 kgs (66-88 lbs) 30-40 PSI (2.07-2.76 BAR)
40-50 kgs (88-110 lbs) 40-50 PSI (2.76-3.45 BAR)
50-60 kgs (110-132 lbs) 50-60 PSI (13.45-4.14 BAR)
60-70 kgs (132-154 lbs) 60-70 PSI (4.14-4.83 BAR)