Differnce between US Spec and Candaian Spec rotors
It's been discussed as to which is which quite a bit (see the threads that Mike just posted).
USA/Canada-spec isn't an exact thing, and depends on the year, model and drivetrain of the vehicle. A rotor simply saying "Canada-Spec" does not mean that it only fits Canadian cars.
There are essentially 4-types of rotors for the 2IS in North America. For the IS250, there are 28mm and 32mm thick rotors and for the IS350 there are inboard- or outboard-venting.
Basically the big differences are as follows:
For the IS250: They are either 28mm thick non-directional (2006-2008 USA-Spec, 2006-2010 Canada-Spec, and 2011-2013 Canada-Spec RWD) or 32mm thick directional (2009-2013 USA-Spec and 2011-2013 Canada-Spec AWD)
For the IS350: They either have outboard venting (2006-2008 USA-Spec, 2006-2010 Canada-Spec, and 2011-2013 Canad-Spec RWD) or inboard venting (2009-2013 USA-Spec and 2011-2013 Canada-Spec AWD).
On an IS250, it really matters which type you get and it needs to match your caliper setup. For the IS350 RWD either type will fit fine without issue. For the IS350 AWD you need to get the inboard vented type to ensure proper clearance to the hub mounting bolts, the outboard vented type will hit those bolts.
Other fact: Canada-spec is the same as everywhere else in the world spec. For some reason the USA used different rotors for 2009-onward models (also switching to low-dust brake pads until the RWD 3IS F-Sport models brought back the high-friction pads. Everywhere else kept using the high-friction pads on all models (excluding some later IS250 AWD and all IS350 AWD models) until the 3IS when the switch was made to low-dust on all models except RWD F-Sport.
Jeff
USA/Canada-spec isn't an exact thing, and depends on the year, model and drivetrain of the vehicle. A rotor simply saying "Canada-Spec" does not mean that it only fits Canadian cars.
There are essentially 4-types of rotors for the 2IS in North America. For the IS250, there are 28mm and 32mm thick rotors and for the IS350 there are inboard- or outboard-venting.
Basically the big differences are as follows:
For the IS250: They are either 28mm thick non-directional (2006-2008 USA-Spec, 2006-2010 Canada-Spec, and 2011-2013 Canada-Spec RWD) or 32mm thick directional (2009-2013 USA-Spec and 2011-2013 Canada-Spec AWD)
For the IS350: They either have outboard venting (2006-2008 USA-Spec, 2006-2010 Canada-Spec, and 2011-2013 Canad-Spec RWD) or inboard venting (2009-2013 USA-Spec and 2011-2013 Canada-Spec AWD).
On an IS250, it really matters which type you get and it needs to match your caliper setup. For the IS350 RWD either type will fit fine without issue. For the IS350 AWD you need to get the inboard vented type to ensure proper clearance to the hub mounting bolts, the outboard vented type will hit those bolts.
Other fact: Canada-spec is the same as everywhere else in the world spec. For some reason the USA used different rotors for 2009-onward models (also switching to low-dust brake pads until the RWD 3IS F-Sport models brought back the high-friction pads. Everywhere else kept using the high-friction pads on all models (excluding some later IS250 AWD and all IS350 AWD models) until the 3IS when the switch was made to low-dust on all models except RWD F-Sport.
Jeff
Last edited by Jeff Lange; Mar 2, 2020 at 11:18 AM.
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