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!

BKT TR 171 R1 Deep Tread Rear Farm Tire 112x20
BKT TR 171 R1 Deep Tread Rear Farm Tire 112x20
$390.00
Time Remaining: 15h 59m
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1 New 750 20 Tacoma 3 Rib F2 F 2 Farm Tractor Tire 8 ply 750x20 750x20 750 20
1 New 750 20 Tacoma 3 Rib F2 F 2 Farm Tractor Tire 8 ply 750x20 750x20 750 20
$135.00
Time Remaining: 1d 3h
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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
$600.00
Time Remaining: 1d 14h 22m
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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: 1d 16h 41m
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New 20 Hook for Farm Tractor Tire Dual Wheels Rims
New 20 Hook for Farm Tractor Tire Dual Wheels Rims
$13.00
Time Remaining: 1d 23h 6m
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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: 2d 22h 47m
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44X1800 20 4PLY BLEMISHED TURF TIRE
44X1800 20 4PLY BLEMISHED TURF TIRE
$150.00
Time Remaining: 2d 23h 10m
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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
$198.00
Time Remaining: 3d 2h 56m
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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: 3d 5h 1m
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475 65 20 BLEMISHED 4PLY G 2 TRACTOR TIRE
475 65 20 BLEMISHED 4PLY G 2 TRACTOR TIRE
$300.00
Time Remaining: 3d 16h 41m
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32 12 15 20PLY BLEMISHED MINING TIRE
32 12 15 20PLY BLEMISHED MINING TIRE
$300.00
Time Remaining: 3d 16h 41m
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1600R20 USED MICHELIN XL 20PLY TIRE TUBE  FLAP
1600R20 USED MICHELIN XL 20PLY TIRE TUBE FLAP
$150.00
Time Remaining: 3d 16h 42m
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41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
41X1400 20 BLEMISHED MULTI TRAC TURF 4PLY TIRE
$100.00
Time Remaining: 3d 19h 54m
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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: 4d 21h 2m
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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: 4d 23h 40m
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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: 5d 5h 13m

ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
ONE Used 1600R20 MICHELIN Mobile Crane Tubeless Turf Tire
$500.00
Time Remaining: 5d 5h 13m

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: 5d 19h 2m

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
$790.00
Time Remaining: 6d 4h 44m

750 20 TRACTOR AG TIRE TIRES 3 RIB
750 20 TRACTOR AG TIRE TIRES 3 RIB
$170.00
Time Remaining: 8d 12m
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8 Tires315 80R225 L 20 154 151M All PositionDrive Truck Tire 31580225100
8 Tires315 80R225 L 20 154 151M All PositionDrive Truck Tire 31580225100
$2,760.00
Time Remaining: 8d 10h 39m
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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: 9d 1h 43m
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750 20 TIRE W 12 BOLT 4 1 2 RIM
750 20 TIRE W 12 BOLT 4 1 2 RIM
$30.00
Time Remaining: 9d 18h 2m
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355 30D20 TIRE W 8 BOLT 6 RIM
355 30D20 TIRE W 8 BOLT 6 RIM
$30.00
Time Remaining: 9d 19h 12m
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900 20 TIRE W 5 BOLT 2 3 4 RIM
900 20 TIRE W 5 BOLT 2 3 4 RIM
$30.00
Time Remaining: 9d 20h 47m
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925 20 TIRE W 12 BOLT 4 1 2 RIM
925 20 TIRE W 12 BOLT 4 1 2 RIM
$30.00
Time Remaining: 9d 21h 45m
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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: 10d 20h 1m
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IH International Farmall McCormick I 6 Front 20 Inch Castings  Tires In MN
IH International Farmall McCormick I 6 Front 20 Inch Castings Tires In MN
$300.00
Time Remaining: 11d 5h 9m
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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: 11d 13h 24m
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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: 11d 17h 3m
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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: 11d 17h 8m
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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: 11d 17h 10m
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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: 11d 17h 30m
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Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
Tire Chain Tighteners Adjusters Spring 10 20 Rims 125627
$12.00
Time Remaining: 12d 17h 20m
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Tire Chain Tighteners Adjusters Rubber 20 30 Rims 125549
Tire Chain Tighteners Adjusters Rubber 20 30 Rims 125549
$24.00
Time Remaining: 12d 17h 20m
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TWO New 750 20 BKT AS 504 Lug Farm Tractor Implement Tires and Tubes 8 ply
TWO New 750 20 BKT AS 504 Lug Farm Tractor Implement Tires and Tubes 8 ply
$308.00
Time Remaining: 12d 21h 28m
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6 Tires315 80R225 L 20 154 151M All PositionDrive Truck Tire 31580225100
6 Tires315 80R225 L 20 154 151M All PositionDrive Truck Tire 31580225100
$2,088.00
Time Remaining: 13d 9h 14m
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4 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
4 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
$1,380.00
Time Remaining: 13d 11h 42m
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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
$79.06
Time Remaining: 13d 15h 18m
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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
$35.00
Time Remaining: 15d 5h 47m
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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: 16d 5h 10m
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John Deere Rear Dual Wheel Kit 3038R Series 20 inch tires 43 x 1600 x 20 NHS JD
John Deere Rear Dual Wheel Kit 3038R Series 20 inch tires 43 x 1600 x 20 NHS JD
$1,300.00
Time Remaining: 16d 19h 13m
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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: 17d 14m
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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: 17d 22m
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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: 17d 28m
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750 20 TIRE W 8 BOLT 5 3 4 RIM
750 20 TIRE W 8 BOLT 5 3 4 RIM
$30.00
Time Remaining: 17d 16h 43m
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Voltyre 112 20 tires BRAND NEW
Voltyre 112 20 tires BRAND NEW
$250.00
Time Remaining: 17d 21h 21m
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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: 19d 46m
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41X400 20NHS TIRE W 6 BOLT 5 1 4 PILOT HOLE
41X400 20NHS TIRE W 6 BOLT 5 1 4 PILOT HOLE
$400.00
Time Remaining: 19d 17h 57m
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One New 650 20  700 20 Tube with TR75 Vale Stem for Truck Tires 120610
One New 650 20 700 20 Tube with TR75 Vale Stem for Truck Tires 120610
$38.00
Time Remaining: 20d 17h 29m
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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: 20d 17h 49m
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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: 20d 17h 52m
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New 900 20  900R20 Tube TR175 valve for Truck Tires FREE Shipping 120640
New 900 20 900R20 Tube TR175 valve for Truck Tires FREE Shipping 120640
$35.00
Time Remaining: 20d 17h 55m
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New 1000 20  1000R20 Tube TR78 valve for Truck Tires FREE Shippig 120650
New 1000 20 1000R20 Tube TR78 valve for Truck Tires FREE Shippig 120650
$38.00
Time Remaining: 20d 17h 58m
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TWO TIRES 400 15 F2 Three Rib tractor FRONT tires With TUBES Free Shipping
TWO TIRES 400 15 F2 Three Rib tractor FRONT tires With TUBES Free Shipping
$117.95
Time Remaining: 21d 6h 6m
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Tire 750 x 20SL 6 Ply Tri Rib New Universal
Tire 750 x 20SL 6 Ply Tri Rib New Universal
$206.00
Time Remaining: 21d 6h 42m
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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: 21d 6h 44m
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1 125L 20 Firestone Ag Tractor Traction Tire Power Implement I 3 4 Ply 314676
1 125L 20 Firestone Ag Tractor Traction Tire Power Implement I 3 4 Ply 314676
$209.00
Time Remaining: 22d 1h 40m
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6 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
6 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
$2,028.00
Time Remaining: 22d 3h 37m
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400 15 F2 Three Rib FRONT Tractor Tire With TUBE new Free Shipping
400 15 F2 Three Rib FRONT Tractor Tire With TUBE new Free Shipping
$68.75
Time Remaining: 22d 5h 24m
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2 New 900 20 3 rib John Deere Front Tractor Tires  Tubes sub for 950 20
2 New 900 20 3 rib John Deere Front Tractor Tires Tubes sub for 950 20
$790.00
Time Remaining: 22d 23h 24m
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Tire 22x66 10 Dunlop 20 ply 180 mph
Tire 22x66 10 Dunlop 20 ply 180 mph
$98.00
Time Remaining: 23d 11m
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implement farm tractor TUBE for 83 20 95 20 tire
implement farm tractor TUBE for 83 20 95 20 tire
$37.95
Time Remaining: 23d 3h 56m
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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: 23d 6h 30m
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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: 23d 6h 30m
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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: 23d 7h 9m
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6 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
6 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
$2,250.00
Time Remaining: 23d 10h 44m
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8 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
8 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
$2,960.00
Time Remaining: 23d 10h 50m
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4 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
4 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
$1,780.00
Time Remaining: 23d 12h 41m
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6 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
6 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
$2,610.00
Time Remaining: 23d 12h 55m
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8 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
8 Tires 425 65R225 L 20 165J TL New All Position Truck Tire 42565225 R526
$3,448.00
Time Remaining: 23d 13h
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112 20 Turf Tires Set of two
112 20 Turf Tires Set of two
$450.00
Time Remaining: 23d 13h 39m
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B1SB302  Tire Heavy Duty Pneumatic 20 x 2125
B1SB302 Tire Heavy Duty Pneumatic 20 x 2125
$15.57
Time Remaining: 24d 6h 19m
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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: 24d 6h 20m
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4 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
4 Tires 385 65R225 L 20 160K BW New Drive Truck Trailer Tire 38565225 397
$1,520.00
Time Remaining: 24d 9h 9m
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8 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
8 Tires315 80R225 L 20 157 154M All Position Truck Tire 31580225366 766 668
$2,680.00
Time Remaining: 24d 9h 37m
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