Can Am Ryker 900 Tire Size | Stock Specs That Fit

Current street-spec Ryker 900 models use 145/60R16 front tires and a 205/45R16 rear tire, while the Rally trim uses a 205/55R15 rear.

If you’re checking Can Am Ryker 900 tire size before buying new rubber, the front answer is easy: both front tires stay at 145/60R16 on current 900 trims. The rear is where owners get tripped up. Street-spec 900 models use a 205/45R16 rear, while the Rally runs a 205/55R15 rear on a 15-inch wheel. Get that rear size wrong and you can end up with a tire that won’t seat on the rim, rubs, or changes the ride more than you wanted.

That’s why the smart move is to check three things, not one: the tire size, the wheel diameter, and the trim. The Ryker 900 platform shares plenty of parts across models, but the Rally’s rear setup is not the same as the street setup. If you only read “205 rear,” you can still order the wrong tire.

Can Am Ryker 900 Tire Size By Trim

Here’s the factory picture for current 900 models:

• Ryker 900 street setup: 145/60R16 front, 205/45R16 rear
• Ryker Rally 900: 145/60R16 front, 205/55R15 rear
• Front load and speed code: 66T
• Rear load and speed code: 77T on the street rear, 81T on the Rally rear

The front size staying the same makes shopping easier. You can shop the front pair with one target in mind. The rear takes more care. A 16-inch rear tire and a 15-inch rear tire are not close substitutes. They mount to different wheel diameters, and the sidewall shape changes with them.

What The Numbers Mean

Front Code

Read 145/60R16 from left to right. The first number is section width in millimeters. The second is the aspect ratio, which tells you the sidewall height as a share of the width. The R marks a radial tire. The last number is the wheel diameter in inches.

Rear Code

The rear code works the same way. So a 205/45R16 rear is wider than the front, shorter in sidewall than the Rally rear, and built for a 16-inch wheel. A 205/55R15 Rally rear keeps the same width, adds more sidewall, and drops to a 15-inch wheel.

BRP’s factory sheets spell that out in black and white. The 2026 Ryker Sport spec sheet lists XPS Ride 145/60 R16 fronts and a 205/45 R16 rear, while the 2026 Ryker Rally spec sheet shows the same front size with a 205/55 R15 rear.

Factory Spec Item	Street Ryker 900	Ryker Rally 900
Front tire size	145/60R16 MC 66T	145/60R16 MC 66T
Rear tire size	205/45R16 MC 77T	205/55R15 MC 81T
Front wheel diameter	16 in.	16 in.
Rear wheel diameter	16 in.	15 in.
Front wheel width	4.5 in.	4.5 in.
Rear wheel width	6.5 in.	6.5 in.
Front tire line	XPS Ride	XPS Rally
Rear tire line	XPS Ride	XPS Rally

Why The Rear Tire Gets All The Attention

The Ryker puts a lot of feel through that single rear tire. Change the size and you change more than looks. A shorter sidewall can sharpen response. A taller sidewall can add a bit more cushion and alter the way the rear loads up over bumps. On the Rally, BRP paired that taller 55-series rear with a 15-inch wheel and an all-road tire setup, not the street tire package used on the Sport.

That means rear tire shopping is not a place for guesses. A listing that says “fits Ryker 900” can still be off if it doesn’t split street and Rally fitment. Match the trim first, then the wheel diameter, then the full size code.

Street Setup Vs Rally Setup

The street rear is 205/45R16. That size keeps the rear profile lower and pairs with the 16-inch rear wheel. The Rally rear is 205/55R15. Width stays the same at 205, but the taller sidewall and smaller wheel make it a different package. You can’t swap one for the other unless you also change the wheel and build around that choice.

If your Ryker has already been modified by a prior owner, do not order from memory. Read the sidewall, measure the rim, and check the tire placard on the machine. That five-minute check beats dealing with returns, bead seating trouble, or a bike stuck on stands while you wait for the right rear.

Before You Buy Replacement Tires

A clean fitment check saves money and hassle. Run through this list before you click buy:

1. Confirm whether you have a street 900 or a Rally.
2. Read the rear sidewall and note the full size code.
3. Match the wheel diameter to the tire diameter.
4. Stay at or above the factory load and speed code.
5. Buy fronts as a matched pair when tread wear is uneven.

That load and speed code matters more than many owners think. The street rear’s 77T and the Rally rear’s 81T are part of the factory spec, not random extra text. If you drop below the original rating, you’re stepping away from the stock target BRP chose for the machine.

Code On Tire	What It Tells You	Ryker 900 Example
145 or 205	Tire width in millimeters	145 front, 205 rear
60, 45, or 55	Sidewall height as a share of width	60 front, 45 street rear, 55 Rally rear
R	Radial construction	R in every stock size
15 or 16	Wheel diameter in inches	16 front, 16 street rear, 15 Rally rear
66, 77, 81	Load index	66 front, 77 or 81 rear
T	Speed rating letter	T on stock front and rear tires

When Aftermarket Shopping Goes Sideways

The most common slip is shopping by width alone. Two rear tires can both be 205 wide and still be wrong for your wheel. The second slip is skipping the load code. The third is mixing tread types in a way that doesn’t fit how the Ryker is used. A street-biased machine that spends its life on pavement should not be bought like a Rally. The reverse is true too.

Brand choice can vary. The factory size does not. If you want stock fit, stay with the stock dimensions first. Then pick the brand, tread, and price point that suit your riding style.

Checks On Your Own Ryker

You don’t need a lift or a shop visit to verify tire size. Use this routine:

• Turn the bars so the front sidewall is easy to read.
• Read one front tire fully, not just the width.
• Read the rear sidewall and write down every number and letter.
• Check the rear wheel diameter if you’re unsure whether it’s a Rally wheel.
• Compare what you found with the trim and stock spec.

Do that once and tire buying gets a lot easier. You’ll know whether your Ryker is still on stock wheels, whether a past owner changed the rear, and whether an online listing is written with enough detail to trust.

Stock Answer For Most Buyers

If you just want the stock answer, here it is again in plain language. The front pair on current Ryker 900 trims is 145/60R16. The rear on the street setup is 205/45R16. The rear on the Rally is 205/55R15. Match the trim, match the wheel, and match the full code, not just the width.