Re:The grid isn’t ready for 300M EVs by 2030
by namdnay on Saturday May 06, 2023 @06:52PM
(#35846075)
Maybe that’s specific to big US cars? Drum brakes are still completely standard on entry level european and Asian models. Rear discs only come into play when you’re going above 100hp and/or 1300kg
Re:The grid isn’t ready for 300M EVs by 2030
by lstodd on Saturday May 06, 2023 @07:38PM
(#35846405)
Front disk brakes came into widespread use in 1960s and for a good reason.
They are more efficient (read: safety) and much easier to maintain.
Rear brakes are almost redundant on entry level cars except for the parking brake. You can just disconnect them and not notice any significant change in handling.
Re:The grid isn’t ready for 300M EVs by 2030
by namdnay on Saturday May 06, 2023 @07:59PM
(#35846533)
Yes, I haven’t seen front drums in at least 20 years
The Honda Civic Si went to four wheel disk brakes in 1992, over 30 years ago.
Last time I had to touch drum brakes was in 1991 and I'm very (very very) happy about that. Drum brakes are a maintenance nightmare I never again want to experience. I'd rather adjust carburator jets all night before working on drum brakes again.
You need to go back more than that. In the 80s nearly every car had rear drum brakes, that phased out in the early 90s or so. Only the very cheapest cars had drums past that timeframe.
> They lasted pretty much the lifetime of the car.
Having owned a few drum braked cars (including all four wheel drums), not really. You still need to change them as they wear out, it's just a lot more work than disk brake pads which can be swapped out in a few minutes.
The rear brakes do a lot less work than the fronts, particularly on smaller lightweight cars (the kind that still had rear drums in the 90s) so in that sense yes, those rear drums lasted a good while (but certainly not the life of the car).
If you put front drum brakes on a fast & heavy car, you'll be wearing them out pretty quick.