20 Tire

How to measure bicycle shops bicycle sizes /? ie.16 ", 20", etc. Is it the tire to the outside or inside edge or what?

I need to get a new bike for my 6 years old soon. He is on the longest side of a year, nearly 6 years (not fat, just built) and I have no idea on how to measure its current bike to get the size for her birthday next week next. Please help!

Kid's and adult bikes are measured differently, btw. For children, the diameter wheel, which can be printed on the tire sidewall. If not, measure the outside of the tire from one side to the other - Children's bikes are either 12 ", 16", 20 "or 24", so there is enough variation that you will be able to tell fairly easily as one is his. Look at your son's inseam measurement to determine what size to do it. And happy birthday to him!

B1KT114  Tire Kenda Turf 505 K505 20 x 10 x 8
B1KT114 Tire Kenda Turf 505 K505 20 x 10 x 8
$78.17
Time Remaining: 1h 35m
Buy It Now for only: $78.17

B1KT122 Tire Kenda Turf Rider K358 20 x 8 x 8
B1KT122 Tire Kenda Turf Rider K358 20 x 8 x 8
$69.35
Time Remaining: 1h 35m
Buy It Now for only: $69.35

B1KT7202 Tire Kenda Turf Rider K358 20 x 10 x 8
B1KT7202 Tire Kenda Turf Rider K358 20 x 10 x 8
$74.55
Time Remaining: 2h 14m
Buy It Now for only: $74.55

Massey Ferguson Front Tire  Rim off TO 20
Massey Ferguson Front Tire Rim off TO 20
$80.00
Time Remaining: 18h 44m
Buy It Now for only: $80.00

B1SB302  Tire Heavy Duty Pneumatic 20 x 2125
B1SB302 Tire Heavy Duty Pneumatic 20 x 2125
$15.57
Time Remaining: 1d 1h 24m
Buy It Now for only: $15.57

B1SB7202  Tire Carlisle Turf Handlers Turf Saver 20 x 10 x 8
B1SB7202 Tire Carlisle Turf Handlers Turf Saver 20 x 10 x 8
$110.02
Time Remaining: 1d 1h 25m
Buy It Now for only: $110.02

NEW Michelin XMCL 380 75 R20 Tubeless Radial Tractor tire
NEW Michelin XMCL 380 75 R20 Tubeless Radial Tractor tire
$435.00
Time Remaining: 1d 13h 14m
Buy It Now for only: $435.00

ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
$500.00
Time Remaining: 1d 17h 57m

ONE USED 48 310020 Speader 12 Ply Goodyear Tire on Used Wheel
ONE USED 48 310020 Speader 12 Ply Goodyear Tire on Used Wheel
$500.00
Time Remaining: 1d 23h 23m

TWO 41 1400x20 Kubota John Deere Mighty Mow Galaxy 4 Ply Tubeless Turf Tires
TWO 41 1400x20 Kubota John Deere Mighty Mow Galaxy 4 Ply Tubeless Turf Tires
$400.00
Time Remaining: 2d 9m

2 Tires Carlisle Turf Saver 20 x 8 x 8 WITH RIMS
2 Tires Carlisle Turf Saver 20 x 8 x 8 WITH RIMS
$160.00
Time Remaining: 2d 44m
Buy It Now for only: $160.00

TWO 43 1600x20 R4 Titan John Deere 750 Convert Turf Tires to R4 Lug Tires
TWO 43 1600x20 R4 Titan John Deere 750 Convert Turf Tires to R4 Lug Tires
$700.00
Time Remaining: 2d 19h 51m

Pair 112x20 tractor tires 112 20
Pair 112x20 tractor tires 112 20
$560.00
Time Remaining: 2d 21h 54m
Buy It Now for only: $560.00

TWO 750X20 750 20 Six ply Triple Rib Farm Tractor Tires with Tubes
TWO 750X20 750 20 Six ply Triple Rib Farm Tractor Tires with Tubes
$274.00
Time Remaining: 3d 17h 1m

20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
$45.00
Time Remaining: 3d 21h 10m
Buy It Now for only: $45.00

475 65 20 BLEMISHED 4PLY TURF TIRE
475 65 20 BLEMISHED 4PLY TURF TIRE
$300.00
Time Remaining: 4d 12h 42m
Buy It Now for only: $300.00

41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
$125.00
Time Remaining: 4d 12h 44m
Buy It Now for only: $125.00

NEW MULTI TRAC C S TITAN 41 X 1400 20 NHS TRACTOR TIRE WHEEL retail 368
NEW MULTI TRAC C S TITAN 41 X 1400 20 NHS TRACTOR TIRE WHEEL retail 368
$150.00
Time Remaining: 4d 14h 46m

1600R20 USED MICHELIN XL 20PLY TIRE TUBE  FLAP
1600R20 USED MICHELIN XL 20PLY TIRE TUBE FLAP
$150.00
Time Remaining: 4d 15h 46m
Buy It Now for only: $150.00

32 12 15 20PLY BLEMISHED TIRE
32 12 15 20PLY BLEMISHED TIRE
$300.00
Time Remaining: 4d 15h 48m
Buy It Now for only: $300.00

B1TI112 Tire Carlisle Big Biters Super Lug 20 x 10 x 8
B1TI112 Tire Carlisle Big Biters Super Lug 20 x 10 x 8
$118.87
Time Remaining: 4d 16h 14m
Buy It Now for only: $118.87

B1TI115  Tire Carlisle Turf Handlers Turf Saver 20 x 8 x 10
B1TI115 Tire Carlisle Turf Handlers Turf Saver 20 x 8 x 10
$94.03
Time Remaining: 4d 16h 14m
Buy It Now for only: $94.03

B1TI120 Tire Carlisle Turf Handlers Turf Saver 20 x 10 x 10
B1TI120 Tire Carlisle Turf Handlers Turf Saver 20 x 10 x 10
$122.38
Time Remaining: 4d 16h 14m
Buy It Now for only: $122.38

B1TI121  Tire Carlisle Smooth Operators Straight Rib 20 x 10 x 10
B1TI121 Tire Carlisle Smooth Operators Straight Rib 20 x 10 x 10
$124.19
Time Remaining: 4d 16h 14m
Buy It Now for only: $124.19

B1TI122  Tire Carlisle Turf Handlers Turf Saver 20 x 8 x 8
B1TI122 Tire Carlisle Turf Handlers Turf Saver 20 x 8 x 8
$97.56
Time Remaining: 4d 16h 14m
Buy It Now for only: $97.56

B1TI20  Tire Carlisle Gripping Performers Stud 41 35 x 5
B1TI20 Tire Carlisle Gripping Performers Stud 41 35 x 5
$26.48
Time Remaining: 4d 17h 56m
Buy It Now for only: $26.48

B1TI206 Tire Carlisle Turf Handlers Turf Saver II 20 x 8 x 8
B1TI206 Tire Carlisle Turf Handlers Turf Saver II 20 x 8 x 8
$88.71
Time Remaining: 4d 19h 5m
Buy It Now for only: $88.71

14 20 MICHELIN TRUCK MILITARY GRAIN COMBINE WAGON MANURE SPREADER NICE TIRES
14 20 MICHELIN TRUCK MILITARY GRAIN COMBINE WAGON MANURE SPREADER NICE TIRES
$425.00
Time Remaining: 5d 11h 52m
Buy It Now for only: $425.00

44X1800 20 4PLY BLEMISHED TURF TIRE
44X1800 20 4PLY BLEMISHED TURF TIRE
$150.00
Time Remaining: 5d 12h 22m
Buy It Now for only: $150.00

B1TI405 Tire Carlisle Turf Handlers Turf Master 20 x 10 x 8
B1TI405 Tire Carlisle Turf Handlers Turf Master 20 x 10 x 8
$126.65
Time Remaining: 5d 17h 5m
Buy It Now for only: $126.65

B1TI412  Tire Carlisle Turf Handlers Turf Master 20 x 10 x 10
B1TI412 Tire Carlisle Turf Handlers Turf Master 20 x 10 x 10
$131.33
Time Remaining: 5d 17h 31m
Buy It Now for only: $131.33

2 tires titan 20 x 1000 8 NHS
2 tires titan 20 x 1000 8 NHS
$59.99
Time Remaining: 6d 13h 49m

SET OF TWO TIRE FLAPS 1000R20 1000R20 TIRE FLAPS CENTER HOLE
SET OF TWO TIRE FLAPS 1000R20 1000R20 TIRE FLAPS CENTER HOLE
$41.95
Time Remaining: 6d 15h 29m
Buy It Now for only: $41.95

SET OF TWO TIRE FLAPS 1100 1200R20 1100 1200R20 TIRE FLAPS CENTER HOLE
SET OF TWO TIRE FLAPS 1100 1200R20 1100 1200R20 TIRE FLAPS CENTER HOLE
$49.95
Time Remaining: 6d 15h 32m
Buy It Now for only: $49.95

B1TI58  Tire Carlisle Smooth Operators Smooth 20 x 10 x 10
B1TI58 Tire Carlisle Smooth Operators Smooth 20 x 10 x 10
$126.00
Time Remaining: 6d 17h 13m
Buy It Now for only: $126.00

1 New 750 20 Tube for Front Tractor Implement Wagon Tires FREE Shipping 281900
1 New 750 20 Tube for Front Tractor Implement Wagon Tires FREE Shipping 281900
$35.00
Time Remaining: 6d 17h 42m
Buy It Now for only: $35.00

B1TI769  Tire Carlisle Turf Handlers Turf Trac R S 20 x 10 x 8
B1TI769 Tire Carlisle Turf Handlers Turf Trac R S 20 x 10 x 8
$113.53
Time Remaining: 6d 18h 34m
Buy It Now for only: $113.53

B1TI774  Tire Carlisle Turf Handlers Turf Trac R S 20 x 10 x 10
B1TI774 Tire Carlisle Turf Handlers Turf Trac R S 20 x 10 x 10
$126.00
Time Remaining: 6d 18h 34m
Buy It Now for only: $126.00

775 x14 tire and rim 20 tread item1000
775 x14 tire and rim 20 tread item1000
$40.00
Time Remaining: 7d 10h 30m
Buy It Now for only: $40.00

BKT TR171 R1 Deep Tread Rear Farm Tire 112x20
BKT TR171 R1 Deep Tread Rear Farm Tire 112x20
$390.00
Time Remaining: 7d 11h 4m
Buy It Now for only: $390.00

TWO 750X20 750 20 Six ply Triple Rib Tractor Tires with Tubes
TWO 750X20 750 20 Six ply Triple Rib Tractor Tires with Tubes
$274.00
Time Remaining: 8d 11h 46m
Buy It Now for only: $274.00

New 20 Hook for Farm Tractor Tire Dual Wheels Rims
New 20 Hook for Farm Tractor Tire Dual Wheels Rims
$13.00
Time Remaining: 8d 18h 11m
Buy It Now for only: $13.00

2 95 20 TITAN TRACTOR AG TIRE TIRES
2 95 20 TITAN TRACTOR AG TIRE TIRES
$350.00
Time Remaining: 8d 19h 34m
Buy It Now for only: $350.00

B1TI551 New Universal 20 x 8 x 8 Carlisle Turf Handlers Multi Trac Tire
B1TI551 New Universal 20 x 8 x 8 Carlisle Turf Handlers Multi Trac Tire
$103.00
Time Remaining: 9d 17h 52m
Buy It Now for only: $103.00

184 30 MULTI TRAC TIRES CASE FORD JOHN DEERE TRACTOR PULL 20
184 30 MULTI TRAC TIRES CASE FORD JOHN DEERE TRACTOR PULL 20
$575.00
Time Remaining: 10d 6m
Buy It Now for only: $575.00

380 70R20 GOODYEAR DT810 TIRES W RIMS FOR JOHN DEERE COMPACT TRACTORS S91002
380 70R20 GOODYEAR DT810 TIRES W RIMS FOR JOHN DEERE COMPACT TRACTORS S91002
$750.00
Time Remaining: 10d 17h 57m
Buy It Now for only: $750.00

John Deere 3000 Tractor Dual Rim Rims Clamps  Tire 43  16  20 NHS Galaxy
John Deere 3000 Tractor Dual Rim Rims Clamps Tire 43 16 20 NHS Galaxy
$775.00
Time Remaining: 11d 11h 34m
Buy It Now for only: $775.00

750 20 TRACTOR AG TIRE TIRES 3 RIB
750 20 TRACTOR AG TIRE TIRES 3 RIB
$170.00
Time Remaining: 11d 12h 19m
Buy It Now for only: $170.00

One new 20 x 5 Flap for 600 20 650 20  700 20 antique truck tires
One new 20 x 5 Flap for 600 20 650 20 700 20 antique truck tires
$38.00
Time Remaining: 11d 16h 7m
Buy It Now for only: $38.00

2 20x800 10 20 800 10 Compact Garden Tractor Riding Lawn Mower R 1 lug TIRES
2 20x800 10 20 800 10 Compact Garden Tractor Riding Lawn Mower R 1 lug TIRES
$196.41
Time Remaining: 11d 18h 45m
Buy It Now for only: $196.41

2 48 31 20 FIRESTONE GOODYEAR FLOTATION TIRE TERRA 10 PLY ON DAYTON RIMS
2 48 31 20 FIRESTONE GOODYEAR FLOTATION TIRE TERRA 10 PLY ON DAYTON RIMS
$2,250.00
Time Remaining: 13d 13h 6m
Buy It Now for only: $2,250.00

105 LR12 5LR 18 20 Farm Tractor Tire Inner Tube Radial or Bias
105 LR12 5LR 18 20 Farm Tractor Tire Inner Tube Radial or Bias
$55.00
Time Remaining: 14d 15h 27m
Buy It Now for only: $55.00

1 48 25 20 FIRESTONE FLOTATION 23 DEGREE TIRE TERRA HIGH FLOTATION 10 PLY
1 48 25 20 FIRESTONE FLOTATION 23 DEGREE TIRE TERRA HIGH FLOTATION 10 PLY
$1,100.00
Time Remaining: 15d 20h 48m
Buy It Now for only: $1,100.00

2 20X1000 10 SMOOTH TURF TIRES GOLF GREENS MOWER FIT JACOBSEN RANSOME JOHN TIRE
2 20X1000 10 SMOOTH TURF TIRES GOLF GREENS MOWER FIT JACOBSEN RANSOME JOHN TIRE
$71.50
Time Remaining: 15d 21h 16m
Buy It Now for only: $71.50

PoulanPro Rear Tractor Tire Inner Tube PP80006 71525J 18x85 16x95 20x10
PoulanPro Rear Tractor Tire Inner Tube PP80006 71525J 18x85 16x95 20x10
$22.00
Time Remaining: 16d 1h 48m
Buy It Now for only: $22.00

TWO 400 15 F2 Three Rib tractor FRONT tires With TUBES  Free Shipping too
TWO 400 15 F2 Three Rib tractor FRONT tires With TUBES Free Shipping too
$127.50
Time Remaining: 16d 17h 43m
Buy It Now for only: $127.50

1200R20 Doberman Auto Butyl Tire Tube
1200R20 Doberman Auto Butyl Tire Tube
$50.00
Time Remaining: 16d 19h 19m
Buy It Now for only: $50.00

Firestone 1000R20 1280R20 Tire Tube
Firestone 1000R20 1280R20 Tire Tube
$99.00
Time Remaining: 16d 19h 30m
Buy It Now for only: $99.00

John Deere jel filled tractor tire  wheel 95 x 20
John Deere jel filled tractor tire wheel 95 x 20
$250.00
Time Remaining: 16d 19h 36m
Buy It Now for only: $250.00

ICC Predator Shivel Grip Grader Loader 1600x20 Tire Chains PN 2624SI
ICC Predator Shivel Grip Grader Loader 1600x20 Tire Chains PN 2624SI
$475.00
Time Remaining: 17d 15h 6m
Buy It Now for only: $475.00

1 New 750 20 Speedways 3 Rib Front Tractor Tire fits John Deere FREE Shipping
1 New 750 20 Speedways 3 Rib Front Tractor Tire fits John Deere FREE Shipping
$215.00
Time Remaining: 18d 12h 8m
Buy It Now for only: $215.00

1 New 750 20 Speedways 3 Rib Front Tractor Tire fits Farmall FREE Shipping
1 New 750 20 Speedways 3 Rib Front Tractor Tire fits Farmall FREE Shipping
$215.00
Time Remaining: 18d 12h 13m
Buy It Now for only: $215.00

New 750 20 Speedways 3 Rib Front Tractor Tire fits International FREE Shipping
New 750 20 Speedways 3 Rib Front Tractor Tire fits International FREE Shipping
$215.00
Time Remaining: 18d 12h 15m
Buy It Now for only: $215.00

Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
$12.00
Time Remaining: 19d 12h 25m
Buy It Now for only: $12.00

Tire Chain Tighteners Adjusters Rubber 20 30 Rims 125549
Tire Chain Tighteners Adjusters Rubber 20 30 Rims 125549
$24.00
Time Remaining: 19d 12h 25m
Buy It Now for only: $24.00

Ford 8N 600 800 NAA Ferguson TE20 TO30 Tractor 4 X 19 Tire New 3 x 19 Wheel Rim
Ford 8N 600 800 NAA Ferguson TE20 TO30 Tractor 4 X 19 Tire New 3 x 19 Wheel Rim
$80.17
Time Remaining: 20d 10h 23m
Buy It Now for only: $80.17

Befco 000 6964 2 Ply Turf Tire W Wheel 11 x 400 5 Kings Tire 20mm Bore
Befco 000 6964 2 Ply Turf Tire W Wheel 11 x 400 5 Kings Tire 20mm Bore
$34.99
Time Remaining: 20d 15h 12m
Buy It Now for only: $34.99

Carlisle 20 x 1000 8 NHS Tire
Carlisle 20 x 1000 8 NHS Tire
$55.00
Time Remaining: 21d 17h 44m
Buy It Now for only: $55.00

Tire Aid 20 18 x 850 900 x 8 Replacement Tractor Inner Tube with Sealant
Tire Aid 20 18 x 850 900 x 8 Replacement Tractor Inner Tube with Sealant
$15.00
Time Remaining: 21d 20h 2m
Buy It Now for only: $15.00

B15114281 Tire Carlisle Turf Handlers Turf Master 20 x 8 x 10
B15114281 Tire Carlisle Turf Handlers Turf Master 20 x 8 x 10
$104.69
Time Remaining: 23d 15m
Buy It Now for only: $104.69

2 48 25 20 FIRESTONE FLOTATION SAND TIRE TERRA HIGH FLOTATION 10 PLY
2 48 25 20 FIRESTONE FLOTATION SAND TIRE TERRA HIGH FLOTATION 10 PLY
$1,750.00
Time Remaining: 23d 19h 19m
Buy It Now for only: $1,750.00

2 42 25 20 PRIMEX FLOTATION TIRE TERRA HIGH FLOTATION 16 PLY NEW NEVER MOUNTED
2 42 25 20 PRIMEX FLOTATION TIRE TERRA HIGH FLOTATION 16 PLY NEW NEVER MOUNTED
$4,000.00
Time Remaining: 23d 19h 27m
Buy It Now for only: $4,000.00

Two New 750 20 Vintage Tread Front Tractor Tires and Tubes
Two New 750 20 Vintage Tread Front Tractor Tires and Tubes
$298.00
Time Remaining: 23d 19h 33m
Buy It Now for only: $298.00

2 48 31 20 GOODYEAR FLOTATION TIRE TERRA 10 PLY ON DAYTON RIMS
2 48 31 20 GOODYEAR FLOTATION TIRE TERRA 10 PLY ON DAYTON RIMS
$2,250.00
Time Remaining: 23d 19h 42m
Buy It Now for only: $2,250.00

2 48 25 20 ALLIANCE FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 10 PLY
2 48 25 20 ALLIANCE FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 10 PLY
$1,750.00
Time Remaining: 23d 20h 35m
Buy It Now for only: $1,750.00

New 83 20 BKT Farm Tractor Lug Tire  Tube 6 ply R 1
New 83 20 BKT Farm Tractor Lug Tire Tube 6 ply R 1
$195.00
Time Remaining: 24d 15h 2m
Buy It Now for only: $195.00