Home  >  Motorcycle tyres  >  90 / 90 21  >  CST Tyres  >  CST 90 / 90 21
Tyre size:
What tyre size do you require?
The exact size of a tyre can be found on its sidewall.
The following chart shows you how to read a tyre size.
1. Overall tire width in mm
2. Ratio of tire height to tire width in%
3. Tire design: ''R'' = radial tires (widely used), ''D'' or ''-'' = diagonal tires (rare)
4. Required rim diameter for this tire in inches
5. Key figure for tire load capacity
6. Key figure for the permissible maximum speed (speed index)
7. Motorcycle tire identification, tires only approved for motorcycles
8. DOT labeling
9. Date of manufacture of the tire (week of production / year of production)
 
/
SPEED INDEX:
The speed index indicates the maximum speed intended for the tyre. Up to this value, the manufacturer guarantees optimum operation with the appropriate tyre pressure. The maximum speed allowed for this vehicle is given in the vehicle owner's manual; this information can be used to select the appropriate speed index for the tyre. The speed index is the last mark on the sidewall of the tyre.
 

Our offer for  CST    90/90  21     

search by size: 5 Results

Sort by:  

Details

Add product to compare

Prices include VAT and delivery within Ireland

Show all the tyres in the selected size
Pirelli SCORPION MT90 A/T
Pirelli
Pirelli
SCORPION MT90 A/T
90/90 -21 54V TL M/C Front wheel

Tyre type

Enduro

limited stock
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 200503
(1)

Reifentest.com

just  € 192.44
limited stock
Details
Pirelli SCORPION MT90 A/T
Pirelli
Pirelli
SCORPION MT90 A/T
90/90 -21 54V TL M/C Front wheel

Tyre type

Enduro

limited stock
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 200503
(1)

Reifentest.com

just  € 195.98
limited stock
Details
Dunlop D404 F
Dunlop
Dunlop
D404 F
90/90 -21 54S TT M/C Front wheel

Tyre type

Chopper / Cruiser

TT = This tyre needs a tube

limited stock
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(6)
Average based on 6 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 238944
27.05.2022 from ken
had a 3 week delay on shipping but was informed of the delay. all good in the hood. happy with price and tyre
18.10.2013 from p lear
good allround tyre
02.11.2009 from Gray Barnes
Good all round tyre. Resists squaring off too quickly and hard wearing. I usually get around 12,000 km out of a set with mixed speed riding on a heavy cruiser.
14.05.2009 from A Williams (the daily grind)
Ride on Dunlop 404's front and rear - up to 6000 km's per month. Wouldn't want to risk a change to any other.
(6)

Reifentest.com

just  € 197.25
limited stock
Details
Shinko SR999
Shinko
SR999
90/90 -21 54H TL Front wheel

Tyre type

Chopper / Cruiser

limited stock
just  € 198.26
limited stock
Details
ME888 Marathon Ultra
Metzeler ME888 Marathon Ultra
Metzeler
Metzeler
ME888 Marathon Ultra
90/90 -21 54H TL M/C Front wheel

Tyre type

Chopper / Cruiser

limited stock
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(6)
Average based on 6 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 1524453
10.03.2024 from Adrian
Perfect tyres for all round riding
(6)

Reifentest.com

just  € 203.90
limited stock
Details
Shinko SR777 WW
Shinko
SR777 WW
90/90 -21 54H TL Front wheel

Tyre type

Chopper / Cruiser

available
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 23202
(1)

Reifentest.com

just  € 230.60
available
Details
Shinko SR999
Shinko
SR999
90/90 -21 54H TL Front wheel

Tyre type

Chopper / Cruiser

limited stock
just  € 236.92
limited stock
Details
There are 7 of 147 tyres displayed
‹
›

Newsletter

Receive news and information on tyres, offers and competitions

Partner garages in your area.

Choose one of our partner garages in your area

Find service Partners:

Contact us under  0818000294

Autopink the best tire-buying service ever

Do you need new tyres quickly and at the best price? AUTOPINK finds your new tyres in less than a minute. We will deliver your choice as fast as possible. A service for you at no extra cost.


Free shipping
More than 300 partner garages
30 days return policy
Payment Methods

© 2026 Autopink.com

scroll_top