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!

Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
$12.00
Time Remaining: 7h 13m
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: 7h 14m
Buy It Now for only: $24.00

1600R20 USED MICHELIN XL 20PLY TIRE TUBE  FLAP
1600R20 USED MICHELIN XL 20PLY TIRE TUBE FLAP
$150.00
Time Remaining: 1d 5h 46m
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: 1d 5h 52m
Buy It Now for only: $400.00

44X1800 20 4PLY BLEMISHED TURF TIRE
44X1800 20 4PLY BLEMISHED TURF TIRE
$150.00
Time Remaining: 2d 6h 15m
Buy It Now for only: $150.00

Carlisle 20 x 1000 8 NHS Tire
Carlisle 20 x 1000 8 NHS Tire
$55.00
Time Remaining: 2d 12h 32m
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: 2d 14h 50m
Buy It Now for only: $15.00

Turf type tractor tires  rims    Tire size is 355 80 D20
Turf type tractor tires rims Tire size is 355 80 D20
$125.00
Time Remaining: 2d 17h 10m
Buy It Now for only: $300.00

Turf Trac R S Tire 20 x 10 8
Turf Trac R S Tire 20 x 10 8
$38.00
Time Remaining: 3d 10h 18m
Buy It Now for only: $38.00

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: 3d 19h 3m
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: 4d 14h 7m
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: 4d 14h 15m
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: 4d 14h 31m
Buy It Now for only: $2,250.00

2 48 25 20 PRIMEX FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 12 PLY
2 48 25 20 PRIMEX FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 12 PLY
$1,850.00
Time Remaining: 4d 15h 17m
Buy It Now for only: $1,850.00

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: 4d 15h 24m
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: 4d 15h 37m
Buy It Now for only: $1,100.00

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 16h

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: 5d 9h 50m
Buy It Now for only: $195.00

Voltyre 112 20 tires BRAND NEW
Voltyre 112 20 tires BRAND NEW
$250.00
Time Remaining: 5d 11h 14m
Buy It Now for only: $250.00

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: 6d 9h 3m

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 10h 34m

ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
$500.00
Time Remaining: 6d 10h 34m

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: 6d 14h 36m

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: 6d 14h 39m
Buy It Now for only: $1,200.00

41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
$125.00
Time Remaining: 6d 14h 42m
Buy It Now for only: $125.00

475 65 20 BLEMISHED 4PLY TURF TIRE
475 65 20 BLEMISHED 4PLY TURF TIRE
$300.00
Time Remaining: 6d 14h 43m
Buy It Now for only: $300.00

New 650 20  700 20 Tube TR75 for Truck Tires
New 650 20 700 20 Tube TR75 for Truck Tires
$38.00
Time Remaining: 8d 7h 23m
Buy It Now for only: $38.00

New 750 20  750R20 Tube TR177 for Truck Tires
New 750 20 750R20 Tube TR177 for Truck Tires
$35.00
Time Remaining: 8d 7h 42m
Buy It Now for only: $35.00

New 825 20  825R20 Tube TR77 valve for Truck Tires
New 825 20 825R20 Tube TR77 valve for Truck Tires
$35.00
Time Remaining: 8d 7h 46m
Buy It Now for only: $35.00

New 900 20  900R20 Tube TR175 valve for Truck Tires
New 900 20 900R20 Tube TR175 valve for Truck Tires
$35.00
Time Remaining: 8d 7h 48m
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: 8d 7h 51m
Buy It Now for only: $38.00

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: 8d 8h
Buy It Now for only: $298.00

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: 8d 18h 54m
Buy It Now for only: $127.50

Tire 750 x 20SL 6 Ply Tri Rib New Universal
Tire 750 x 20SL 6 Ply Tri Rib New Universal
$206.00
Time Remaining: 8d 20h 35m
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: 8d 20h 37m
Buy It Now for only: $104.69

Laclede 20x800x10 and 20x8x8 Snow Blower Tire Chains PN 1308G
Laclede 20x800x10 and 20x8x8 Snow Blower Tire Chains PN 1308G
$45.00
Time Remaining: 10d 8h 50m
Buy It Now for only: $45.00

Tractor Turf Tires and Rims for a New Holland TZ18TZ20TZ22TZ24 and TZ25DA
Tractor Turf Tires and Rims for a New Holland TZ18TZ20TZ22TZ24 and TZ25DA
$600.00
Time Remaining: 10d 11h 48m
Buy It Now for only: $600.00

Tire 22x66 10 Dunlop 20 ply 180 mph
Tire 22x66 10 Dunlop 20 ply 180 mph
$98.00
Time Remaining: 10d 14h 4m
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: 10d 17h 49m
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: 10d 20h 23m
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: 10d 20h 23m
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: 10d 21h 2m
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: 11d 20h 12m
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: 11d 20h 13m
Buy It Now for only: $110.02

2 48 25 20 GOODYEAR FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 10 PLY
2 48 25 20 GOODYEAR FLOTATION BAR TIRE TERRA TURBO HIGH FLOTATION 10 PLY
$750.00
Time Remaining: 12d 5h 53m
Buy It Now for only: $750.00

20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
20 Truck Skid Loader Imp Tire Valve Stems Wheel TR501
$45.00
Time Remaining: 14d 15h 58m
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: 15d 11h 2m
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: 15d 11h 2m
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: 15d 11h 2m
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: 15d 11h 3m
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: 15d 11h 3m
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: 15d 12h 44m
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: 15d 13h 53m
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: 16d 6h 40m
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: 16d 11h 54m
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: 16d 12h 19m
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: 17d 12h 1m
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: 17d 13h 22m
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: 17d 13h 22m
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: 17d 17h 23m
Buy It Now for only: $2,550.00

775 x14 tire and rim 20 tread item1000
775 x14 tire and rim 20 tread item1000
$40.00
Time Remaining: 18d 5h 18m
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: 18d 5h 53m
Buy It Now for only: $390.00

2 95 20 TITAN TRACTOR AG TIRE TIRES
2 95 20 TITAN TRACTOR AG TIRE TIRES
$350.00
Time Remaining: 18d 10h 49m
Buy It Now for only: $350.00

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: 19d 6h 34m
Buy It Now for only: $274.00

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: 19d 8h 19m
Buy It Now for only: $71.50

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: 19d 9h 17m
Buy It Now for only: $308.00

New 20 Hook for Farm Tractor Tire Dual Wheels Rims
New 20 Hook for Farm Tractor Tire Dual Wheels Rims
$13.00
Time Remaining: 19d 13h
Buy It Now for only: $13.00

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: 20d 18h 54m
Buy It Now for only: $575.00

750 20 TRACTOR AG TIRE TIRES 3 RIB
750 20 TRACTOR AG TIRE TIRES 3 RIB
$170.00
Time Remaining: 20d 19h 18m
Buy It Now for only: $170.00

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: 21d 12h 45m
Buy It Now for only: $750.00

One new 20 x 5 Flap for 600 20  700 20 antique truck tires
One new 20 x 5 Flap for 600 20 700 20 antique truck tires
$40.00
Time Remaining: 22d 10h 55m
Buy It Now for only: $40.00

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: 22d 13h 33m
Buy It Now for only: $196.41

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
$975.00
Time Remaining: 22d 15h 47m
Buy It Now for only: $975.00

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: 24d 7h 54m
Buy It Now for only: $2,250.00

95 20 95 95 20 x20 95x20 95x20 tractor tire farm tires irrigation r1 R 1 R 2
95 20 95 95 20 x20 95x20 95x20 tractor tire farm tires irrigation r1 R 1 R 2
$165.00
Time Remaining: 25d 11h 21m
Buy It Now for only: $165.00

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: 26d 15h 10m
Buy It Now for only: $22.00