Quick Answer

Question: What does 121Q mean on a tire?

121 is the load rating, which is like 3150 pounds per tire. Q is the speed rating, which is 99 mph.

What load range is 121Q?

The rating of 121 shows that it has a load capacity of 3297LBS. Multiply that by four tires (4 x 3,297 = 13,188 pounds) to get your vehicle’s max load carrying capacity. Always remember to install tires that have a load index that is equal or greater than your original factory-installed tires.

Is a 121Q a 10 ply tire?

50R17 121Q 10 Ply Tire.

Is Load Range E better than D?

Expert Reply: Load range D has a capacity of 1,220 lbs at 65 psi, whereas load range E has a capacity of 1,520 lbs at 80 psi. Basically the only difference between the two is the weight capacity.

What does 100h mean on a tire?

The 100 is the tire’s load index, and in the case of 100, it means by itself a properly inflated tire can hold up 800 kilograms (1,764 lb.). Four tires can hold 3,200 kilograms, which for many vehicles provides plenty of capacity for holding up the vehicle and anything that might be inside.

Which is better T or H speed rating?

The “T” or “H” on tires pertain to their speed ratings. A T-rated tire can withstand top speeds of up to 118 mph (190 km/h), while an H-rated tire can support up to 130 mph (210 km/h). It is important to note these markings and stay within those speed limits.

What does XL mean on a tire?

Some vehicles are equipped with “XL” tires. It doesn’t mean that they’re extra large, but it does mean that they are extra-load tires. The load index on these tires is much higher than a standard-load tire, which is why it is important to replace an XL tire with another XL tire.

Are XL tires bigger?

The XL refers to the weight of the car itself. Standard tyres of various sizes have recommended vehicle weights that they can carry. These tyres are marked SL. XL tyres by contrast, tend to be fitted on high end family saloons, performance cars, 4X4s, SUVs and so on – because these vehicles tend to be heavier.

Is 10 ply or 12 ply better?

A tire ply rating is an expression of the tire’s strength and capacity. The ply rating translates in a very direct way to tire capabilities and limitations, especially when it comes to inflation and load capacity.What’s a tire ply rating?

B 4 ply
C 6 ply
D 8 ply
E 10 ply
F 12 ply

How do I know if my tires are 10 ply?

The last letter in a standard tire size indicates the number of layers used in the construction of the tire. If there is no letter, the tire has the standard 4 plies. A “C” indicates 6 plies, a “D” indicates 8 plies, and an “E” indicates 10 plies.

What speed rating is S?

112 mph 180 km/h

Speed Rating Symbol Speed (mph) Speed (km/h)
Q 100 mph 160 km/h
R 106 mph 170 km/h
S 112 mph 180 km/h
T 118 mph 190 km/h

How do I know what ply rating my tires are?

If you don’t see a Load Range or Ply Rating, you might find the letters P (passenger rated, which is 4-ply rated or lower), LT (light truck, which is 6-ply rated or higher), or XL (extra load is typically 4-ply rated with a higher-than-standard Load Index) stamped on the tires.

Is Load Range E good for towing?

At a minimum, Load Range E tires are capable of safely supporting about 3,000 pounds. So, in the case of a dualie (six wheels), the tires collectively will provide more than sufficient grip for safely towing 18,000 pounds.

Do load range F tires ride rough?

Typically, an F rated tire will ride a bit worse than an E rated tire, but there are some exceptions. Load range refers generally to a side ply rating, while load index refers to a tire’s weight rating.

Whats better Load Range E or F?

F-load range tires allow for higher carrying capacity at a higher inflation pressure compared to tires of the same size with an E-load range.

What does 92y mean on a tire?

In this case, the 92 means it can support 1,389 pounds. The Y is the speed rating, or the maximum speed the tire was designed to withstand and maintain. Back to the Z. The letter used to designate the highest possible speed rating, and it meant the tire could withstand more than 149 mph.

What does 113s mean on a tire?

113 is the load rating, it means the tires can handle up to 2535 lbs. S is the speed index, which means the tires can go up to a speed of 112 mph.

What does 102T mean on tire?

102T and 102H are service descriptions. 102 is the Load Index, what this means is, the tire is capable of carrying weight up to, 1,874 lbs per tire. The T and H are speed Ratings, this indicates that a tire is capable of speeds up to, 118 mph and 130 mph (respectively).

What is load range H?

From a G to an H

Truck tires typically come in two load ratings: G and H. Load range G is a 14-ply configuration, while load range H tires have 16 plies. The heavier-rated tire will usually add between 700 pounds and 1,000 pounds more load-bearing capacity per tire (see “How Much is Too Much,” next page).

Should I get H or V-rated tires?

To support running at higher speeds, V-rated tires will have a stiffer sidewall and slightly firmer ride than H-rated tires. For normal driving conditions the H-rated tire will provide a more comfortable ride and the V-rated should give slightly better handling.

Can I use H-rated tires instead of V?

A V-rated car requires a tire designed to operate to a maximum of 149 mph and can thus not be fitted with an H-rated tire.

Are XL tyres worth it?

It is a good idea to buy reinforced tyres if:

You have a vehicle with a powerful engine: XL tyres will then provide greater stability on corners and a better reaction to both acceleration and braking at high speed.

Do XL tyres need higher pressure?

The load capacity of a reinforced tyre also decreases with decreasing air pressure, so XL tyres need higher air pressure. This is the only way to ensure a higher load-bearing capacity. The stipulated tyre speed rating and load index of your XL tyres can normally be found in the last characters on the sidewall.

Are XL tyres run flats?

xl or reinforced are not runflats. They are ‘normal’ tyres with stronger sidewalls.

What does XL mean on Michelin tires?

This is an important part of your tire size. If your car came equipped with XL tires, there’s most likely an important reason. The XL stands for eXtra Load and means the sidewalls of the tire are stronger and capable of handling heavy load requirements.

Can you mix SL and XL tires?

If your factory tire is XL, you can’t change it to SL unless your vehicle load range is matched with it.

What does XL BSW mean on tires?

ORWL = Outlined Raised White Letters. B, BLK, BW, BSW = Blackwall or Black Sidewall. W, WW, WSE = Whitewall or White Sidewall. XNW = Extra Narrow White Width. XL = Extra Load Capacity.

Do they make 12 ply tires?

The 12-ply rating doesn’t actually mean that the tire has 12 different plies or 12 layers. It’s really just the way to classify the tire and to ensure that the manufacturer tested it to meet that 12-ply rating and/or that Load Range F requirement.

What is the highest ply tire?

Light Truck Tires

LT-Metric, LT-Flotation and LT-Numeric Light Truck Tires
Load Range Ply Rating Maximum Load Pressure ≤ 295mm / 11.5″ wide
B 4 35 psi (240 kPa)***
C 6 50 psi (350 kPa)***
D 8 65 psi (450 kPa)***

What does LT mean on a tire?

If a tire size reads, LT235/75R15 104/101S, the LT indicates that this tire is meant for Light Truck use. These tires are made for light-duty and heavy-duty pickup trucks (typically ½ ton, ¾ ton, or 1-ton load capacity), SUVs and vans.