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!

1600R20 USED MICHELIN XL 20PLY TIRE TUBE  FLAP
1600R20 USED MICHELIN XL 20PLY TIRE TUBE FLAP
$150.00
Time Remaining: 13h 28m
Buy It Now for only: $150.00

32 12 15 20PLY BLEMISHED MINING TIRE
32 12 15 20PLY BLEMISHED MINING TIRE
$400.00
Time Remaining: 13h 31m
Buy It Now for only: $400.00

44X1800 20 4PLY BLEMISHED TURF TIRE
44X1800 20 4PLY BLEMISHED TURF TIRE
$150.00
Time Remaining: 17h 32m
Buy It Now for only: $150.00

Pair 2 136x20 Tractor tire 136R20 Radial 136 20
Pair 2 136x20 Tractor tire 136R20 Radial 136 20
$695.00
Time Remaining: 17h 38m
Buy It Now for only: $695.00

Pair 112x20 tractor tires 112 20
Pair 112x20 tractor tires 112 20
$560.00
Time Remaining: 18h 11m
Buy It Now for only: $560.00

B15114281 Tire Carlisle Turf Handlers Turf Master 20 x 8 x 1
B15114281 Tire Carlisle Turf Handlers Turf Master 20 x 8 x 1
$104.69
Time Remaining: 23h 23m
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: 1d 18h 28m
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: 1d 18h 36m
Buy It Now for only: $4,000.00

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: 1d 18h 51m
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: 1d 19h 44m
Buy It Now for only: $1,750.00

1 48 31 20 FIRESTONE FLOTATION 23 DEGREE TIRE TERRA HIGH FLOTATION 10 PLY
1 48 31 20 FIRESTONE FLOTATION 23 DEGREE TIRE TERRA HIGH FLOTATION 10 PLY
$1,100.00
Time Remaining: 1d 19h 58m
Buy It Now for only: $1,100.00

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: 2d 14h 10m
Buy It Now for only: $195.00

Voltyre 112 20 tires BRAND NEW
Voltyre 112 20 tires BRAND NEW
$250.00
Time Remaining: 2d 15h 34m
Buy It Now for only: $250.00

2 48 25 20 FIRESTONE RIB TIRE TERRA HIGH FLOTATION 10 PLY
2 48 25 20 FIRESTONE RIB TIRE TERRA HIGH FLOTATION 10 PLY
$1,200.00
Time Remaining: 3d 19h
Buy It Now for only: $1,200.00

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 11h 12m

ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
$500.00
Time Remaining: 4d 16h 23m

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: 4d 18h 38m

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: 4d 19h 2m

One New 650 20  700 20 Tube with TR75 Vale Stem for Truck Tires
One New 650 20 700 20 Tube with TR75 Vale Stem for Truck Tires
$38.00
Time Remaining: 5d 11h 43m
Buy It Now for only: $38.00

New 750 20  750R20 Tube TR177 for Truck Tires FREE Shipping 120620
New 750 20 750R20 Tube TR177 for Truck Tires FREE Shipping 120620
$35.00
Time Remaining: 5d 12h 2m
Buy It Now for only: $35.00

New 825 20 825R20 Radial Tube TR77 valve for Truck Tires FREE Shipping 120630
New 825 20 825R20 Radial Tube TR77 valve for Truck Tires FREE Shipping 120630
$32.00
Time Remaining: 5d 12h 6m
Buy It Now for only: $32.00

New 900 20  900R20 Tube TR175 valve for Truck Tires
New 900 20 900R20 Tube TR175 valve for Truck Tires
$35.00
Time Remaining: 5d 12h 8m
Buy It Now for only: $35.00

New 1000 20  1000R20 Tube TR78 valve for Truck Tires
New 1000 20 1000R20 Tube TR78 valve for Truck Tires
$38.00
Time Remaining: 5d 12h 11m
Buy It Now for only: $38.00

2 tires titan 20 x 1000 8 NHS
2 tires titan 20 x 1000 8 NHS
$59.99
Time Remaining: 5d 12h 47m

475 65 20 BLEMISHED 4PLY TURF TIRE
475 65 20 BLEMISHED 4PLY TURF TIRE
$300.00
Time Remaining: 5d 16h 9m
Buy It Now for only: $300.00

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: 5d 17h 56m

Tire 750 x 20SL 6 Ply Tri Rib New Universal
Tire 750 x 20SL 6 Ply Tri Rib New Universal
$206.00
Time Remaining: 6d 55m
Buy It Now for only: $206.00

B1TI551  Tire Carlisle Turf Handlers Multi Trac 20 x 8 x 8
B1TI551 Tire Carlisle Turf Handlers Multi Trac 20 x 8 x 8
$104.69
Time Remaining: 6d 58m
Buy It Now for only: $104.69

41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
$125.00
Time Remaining: 6d 11h 4m
Buy It Now for only: $125.00

2 20X1000 10 SMOOTH TURF TIRES GOLF GREENS MOWER FIT RANSOME JOHN DEERE TIRE
2 20X1000 10 SMOOTH TURF TIRES GOLF GREENS MOWER FIT RANSOME JOHN DEERE TIRE
$71.50
Time Remaining: 6d 14h 32m
Buy It Now for only: $71.50

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: 6d 14h 46m

Tire 22x66 10 Dunlop 20 ply 180 mph
Tire 22x66 10 Dunlop 20 ply 180 mph
$98.00
Time Remaining: 7d 18h 25m
Buy It Now for only: $98.00

implement farm tractor TUBE for 83 20 95 20 tire
implement farm tractor TUBE for 83 20 95 20 tire
$37.95
Time Remaining: 7d 22h 9m
Buy It Now for only: $37.95

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: 8d 44m
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: 8d 44m
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: 8d 1h 23m
Buy It Now for only: $74.55

B1SB302  Tire Heavy Duty Pneumatic 20 x 2125
B1SB302 Tire Heavy Duty Pneumatic 20 x 2125
$15.57
Time Remaining: 9d 32m
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: 9d 34m
Buy It Now for only: $110.02

20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
$45.00
Time Remaining: 11d 20h 19m
Buy It Now for only: $45.00

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: 12d 15h 23m
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: 12d 15h 23m
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: 12d 15h 23m
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: 12d 15h 23m
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: 12d 15h 23m
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: 12d 17h 5m
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: 12d 18h 13m
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: 13d 11h 1m
Buy It Now for only: $425.00

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: 13d 16h 14m
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: 13d 16h 39m
Buy It Now for only: $131.33

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: 14d 16h 22m
Buy It Now for only: $126.00

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: 14d 17h 43m
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: 14d 17h 43m
Buy It Now for only: $126.00

2 48 31 20 PRIMEX FLOTATION TIRE TERRA 12 PLY 70 NO RIMS GOOD SET WILL SHIP
2 48 31 20 PRIMEX FLOTATION TIRE TERRA 12 PLY 70 NO RIMS GOOD SET WILL SHIP
$2,550.00
Time Remaining: 14d 21h 43m
Buy It Now for only: $2,550.00

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: 15d 1h 32m
Buy It Now for only: $55.00

775 x14 tire and rim 20 tread item1000
775 x14 tire and rim 20 tread item1000
$40.00
Time Remaining: 15d 9h 39m
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: 15d 10h 13m
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: 16d 10h 55m
Buy It Now for only: $274.00

2 95 20 TITAN TRACTOR AG TIRE TIRES
2 95 20 TITAN TRACTOR AG TIRE TIRES
$350.00
Time Remaining: 16d 11h 8m
Buy It Now for only: $350.00

New 20 Hook for Farm Tractor Tire Dual Wheels Rims
New 20 Hook for Farm Tractor Tire Dual Wheels Rims
$13.00
Time Remaining: 16d 17h 20m
Buy It Now for only: $13.00

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: 17d 17h 1m
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: 17d 23h 15m
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: 18d 17h 6m
Buy It Now for only: $750.00

750 20 TRACTOR AG TIRE TIRES 3 RIB
750 20 TRACTOR AG TIRE TIRES 3 RIB
$170.00
Time Remaining: 18d 21h 49m
Buy It Now for only: $170.00

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: 19d 10h 43m
Buy It Now for only: $775.00

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: 19d 15h 15m
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: 19d 17h 53m
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: 21d 12h 15m
Buy It Now for only: $2,250.00

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 37m
Buy It Now for only: $298.00

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: 23d 19h 56m
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
$60.78
Time Remaining: 23d 20h 24m
Buy It Now for only: $60.78

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: 23d 23h 24m
Buy It Now for only: $22.00

TWO New 750 20 Lug Farm Tractor Implement Tires and Tubes 8 ply
TWO New 750 20 Lug Farm Tractor Implement Tires and Tubes 8 ply
$308.00
Time Remaining: 24d 12h 24m
Buy It Now for only: $308.00

John Deere jel filled tractor tire  wheel 95 x 20
John Deere jel filled tractor tire wheel 95 x 20
$250.00
Time Remaining: 24d 18h 45m
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: 25d 14h 14m
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: 26d 11h 16m
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: 26d 11h 22m
Buy It Now for only: $215.00