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Clearly, on average, cars are being used on fewer journeys of late, and it has been pretty wet. And some folks may have snow and salt to deal with... My guess would be there will be a higher likelyhood of various stuff seizing up, on many cars, than we'd usually see, not just drum brakes on those still fitted with them....

A disk conversion is appealing, but out of my price bracket! Also, maybe because I use the car at least every other day, my drums seem fine - so far...

Tell your insurer though - they should give you a discount for 'adding safety'! :)
It could be the premium increases. The cars ESP is set up to work with the brakes the car was homologated with. Add more braking power and then get into a panic braking situation and the pulses sent to the rear brakes may create an over braked situation...... After all disc brakes generally increase the braking depending on the pedal pressure and the pulses sent by the ESP when it gets called into action.

I would imagine the brake drums are made from poor material. Perhaps it rusts quickly. Supposition of course.
There is very little to service that will prevent the binding some are experiencing. We can clean or sand the shoes and shoe edges and clean up the inner drum faces but if it’s a poor material it will rust up again almost overnight.
I suspect having lots of play in the handbrake and not applying said handbrake is what most will have to do.
Which in my humble means the set up is simply not fit for purpose.
 

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Well, one can dream about lower insurance...... :)

Would a pukka kit not include re-calibrated hydraulic valving to ensure the rears disks don't lock too easily (or indeed, to ensure they get enough hydraulic pressure to be effective)?

As I said somewhere, while binding may well be down to the shoes sticking to the drums, could it (possibly) be in some cases, the handbrake cable sticking at the brake end, the internal lever sticking, or weak/bad batch of springs, and maybe other reasons?... I haven't yet read any clear reports about what was found when the sticking drum brakes were opened up and inspected.... I'm just trying to keep an open mind on the issue....
 

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Blimey even cheap Aygos have discs on the rear these days.
Not according to Toyota's spec sheets they don't. Rear discs don't come on any of the Aygo's. They become standard on the Yaris upwards.

There's nothing wrong with a well designed front disc / rear drum set-up for road cars. Don't forget all the older cars that were considered sports saloons and hot hatches :-
Opel Manta, Astra & Kadett GTE Mk 1 & 2, Vauxhall Chevette HS, Escort Mexico, Escort Twincam, RS1600, RS2000, Vauxhall Magnum, Avenger Tiger, BMW 2002, Some quicker than the Up GTi, some on a par, and some close behind in performance.
As I've said above, I've had no trouble with sticky rear brakes whatsoever, through 2 x High Up 75bhp, 2 x Tsi's, and a Gti, all sold at 3 years old, but with a cumulative 90,000 miles.
It's not clear whether the issue is on 3 year & older cars, and whether the cars with issues have ever had their rear drums / brake shoes changed.
Because I've not had this problem, I can't even say that the materials used are crap, or the design is poor.
Would like to have some more detail as to age of cars that have suffered, mileages etc.
 

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Well, one can dream about lower insurance...... :)

Would a pukka kit not include re-calibrated hydraulic valving to ensure the rears disks don't lock too easily (or indeed, to ensure they get enough hydraulic pressure to be effective)?

As I said somewhere, while binding may well be down to the shoes sticking to the drums, could it (possibly) be in some cases, the handbrake cable sticking at the brake end, the internal lever sticking, or weak/bad batch of springs, and maybe other reasons?... I haven't yet read any clear reports about what was found when the sticking drum brakes were opened up and inspected.... I'm just trying to keep an open mind on the issue....
It has to be the shoes sticking. You would not get that typical bang from a sticking cable.
Any kit cannot have modified valuing to suit the pulses sent by the ESPs brain. We can valve the pressures from the master cylinder as that is a constant where the ESPs pressures depend on how far the sensors tell it the car is out of control.
By replacing drums with discs we are effectively throwing away what the VW engineers designed and throwing away the parameters they engineered in.
As an extreme.
Say I’m driving really hard. Going downhill into a tight left hander too fast so hit the brakes. ESP sends a pulse to the rear inside wheel which then locks up because the power pulse was fine for weedy drums but to much for a disc and calipers ...

Bit extreme maybe but it is possible.

When racing motorcycles we used to increase the bore on the master cylinders to give far more braking power with more feel. A set up like we loved on track would be dangerous on the road. Yes far more power but extremely unforgiving,
 

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Not according to Toyota's spec sheets they don't. Rear discs don't come on any of the Aygo's. They become standard on the Yaris upwards.

There's nothing wrong with a well designed front disc / rear drum set-up for road cars. Don't forget all the older cars that were considered sports saloons and hot hatches :-
Opel Manta, Astra & Kadett GTE Mk 1 & 2, Vauxhall Chevette HS, Escort Mexico, Escort Twincam, RS1600, RS2000, Vauxhall Magnum, Avenger Tiger, BMW 2002, Some quicker than the Up GTi, some on a par, and some close behind in performance.
As I've said above, I've had no trouble with sticky rear brakes whatsoever, through 2 x High Up 75bhp, 2 x Tsi's, and a Gti, all sold at 3 years old, but with a cumulative 90,000 miles.
It's not clear whether the issue is on 3 year & older cars, and whether the cars with issues have ever had their rear drums / brake shoes changed.
Because I've not had this problem, I can't even say that the materials used are crap, or the design is poor.
Would like to have some more detail as to age of cars that have suffered, mileages etc.
OK Picky. 😂😂 We have a 2012 Toyota IQ here and that has rear discs not drums. Drums are out of date junk. Which is why so many dislike them.
 

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Late in here. Stuck on drums are common. I haven't had it yet on the UP! but both my Triumphs have rear drums, and in winter, the drums stick on (always parked with the hand brake off), just drive off, bit of a clunk, all done. Next time you brake the contact point is cleaned, no harm done ! 😉
 

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Not according to Toyota's spec sheets they don't. Rear discs don't come on any of the Aygo's. They become standard on the Yaris upwards.

There's nothing wrong with a well designed front disc / rear drum set-up for road cars. Don't forget all the older cars that were considered sports saloons and hot hatches :-
Opel Manta, Astra & Kadett GTE Mk 1 & 2, Vauxhall Chevette HS, Escort Mexico, Escort Twincam, RS1600, RS2000, Vauxhall Magnum, Avenger Tiger, BMW 2002, Some quicker than the Up GTi, some on a par, and some close behind in performance.
As I've said above, I've had no trouble with sticky rear brakes whatsoever, through 2 x High Up 75bhp, 2 x Tsi's, and a Gti, all sold at 3 years old, but with a cumulative 90,000 miles.
It's not clear whether the issue is on 3 year & older cars, and whether the cars with issues have ever had their rear drums / brake shoes changed.
Because I've not had this problem, I can't even say that the materials used are crap, or the design is poor.
Would like to have some more detail as to age of cars that have suffered, mileages etc.
Agree, nothing wrong with drums on the back of such a small car. The front discs are shared with Audi A3s AFAIK so well braked up front, and don't forget most braking effort is through the front anyway.

Mine sticks. Never liked driving and just letting them twang off. If I can, I reverse the car a touch and they come off without the noise.
 
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I agree, I also think that part of the problem is that over the past twenty / twenty-five years, almost all of the cars that are bigger & relatively more expensive than an Up / Aygo etc have had rear discs, so people forget that part of the maintenance involves cleaning out brake drums, like almost all of the older cars, and so they get caked up with dust and that contributes to the shoes sticking on.
 

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I’m glad it’s common on the UP. It feels like you’re gonna snap something! I park on a sloped drive and gonna be less severe on the handbrake and see what happens.
 

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6.5 months of lockdown, more people working from home and driving a lot less will have a big impact on cars brakes. Discs will corrode a lot quicker and pads and shoes/drums will stick a lot more, especially in cold and wet weather.

As previously said, the best thing you can do is not put the hand brake on overly tight and park in gear. Also find any reason to drive the car at least twice a week and carefully do a few hard stops to remove that corrosion and free things up.

Of our three cars, the Up is the worst for binding drums and it can happen overnight even after driving the previous day.
 

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"of our three cars"...

Is it not the case that of those 3, only the Up has rear drums?

My point is that while drums may sometimes stick, there is nothing here to suggest that statistically, the Up is any worse than any other car using drums.
 

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As I said above. It's a maintenance issue. When all cars had rear drums, we used to have them off every year and clean out the dust, check for leaky wheel cylinders etc. Nowadays with the minority of cars, (but still most city cars), having drums, everyone forgets about it, to the point where most manufacturers have taken it out of their service schedule, so unless you are aware that it should be done, it doesn't get done. First good spring day, I'll be removing mine and cleaning them out.
 
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Agreed....
My drums have never stuck, and I live in wet Cornwall (stuff rusts overnight) and only use the car 2-3 times a week. The brake is pulled firmly on as I park on an incline.
 

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"of our three cars"...

Is it not the case that of those 3, only the Up has rear drums?
No, wife's Mazda 2 has rear drums which gets used in exactly the same manner as the Mii and both have manual handbrakes. My Passat has rear discs and an EPB which mechanically releases.

Presumably it's moisture getting into the drums and causing them to rust?

Maybe it's just another example of bad design/cheap a$$ parts on VAG cars. Bit like the discs on my Passat that start to rust in front of my eyes when I wash it and are knackered after 3 years and 30K!
 

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Ford have no issues with the drum brakes on Fiestas... I’ve had at least 5 of the Mk7 on which is 2008 onwards never once had to leave the handbrake on which when you consider it it’s daft.....

My moneys on poor material used in the manufacture of the drum. I have no problems with my Up but I don’t apply the handbrake. I have nice level parking which of course not everyone one has so I can appreciate it can be a pain....

There is of course a conversion kit but for road use the circa 500 quid is a hefty price to pay.
This is simply the accounts penny pinching when these cars were built. To market and label the GTI variants GTI then fit junk for brakes is nowt short of daft.
 

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OK - I was surprised by Mazda 2 (but it's basically a fiesta I think).

I have had loads of cars with rear drums, including very recent pickups trucks which used to cross small river ravines (it got mucky). Never had a rear drum brake stick.

I doubt it's about "poor materials", as the steel drum and the shoe linings are pretty generic, but I am fairly swayed by the "not well maintained" argument - drums/shoes do last ages, but the dust does build up in them very badly compared with disks (which mostly dump it onto the alloys!), and maybe people don't take them off for a clean out very often....
 

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OK - I was surprised by Mazda 2 (but it's basically a fiesta I think).

I have had loads of cars with rear drums, including very recent pickups trucks which used to cross small river ravines (it got mucky). Never had a rear drum brake stick.

I doubt it's about "poor materials", as the steel drum and the shoe linings are pretty generic, but I am fairly swayed by the "not well maintained" argument - drums/shoes do last ages, but the dust does build up in them very badly compared with disks (which mostly dump it onto the alloys!), and maybe people don't take them off for a clean out very often....
I believe the drums are ductile cast iron. Drums usually are and there are many differing grades of the material ...
As an example there are many many variants of stainless steel some of which are pure and incredibly good. Some are little better than regular steel.
 

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I doubt it's about "poor materials", as the steel drum and the shoe linings are pretty generic, but I am fairly swayed by the "not well maintained" argument
I am sure that it is about "poor material". If there is only small sign of rain, then the drums of the Up not only stick, but they squeal like **** as well. I asked the garage to clean the drums, they cleaned them, and the drums were ok only for one or two weeks only. You can be sure that VW asks from you as much money as possible and they sell you as poor material as possible.
 

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I don't agree with the "not well maintained" arguement either. I have had cars with rear drums from loads of different manufacturers that were never inspected/cleaned and I never had any problems.

Last winter when our Mii was only 6 months old and had done 4K, I first noticed the issue.

This winter it's been worse as it's been colder and there has been more snow. Obvious all the various lockdowns have not helped.

In the last 5 years I have noticed a decline in the quality of discs and pads across manufacturers.

Our 2016 Mazda 2 has done 55K and its has consumed 2 sets of discs and 3 sets of Pads. Definitely no track days! At least it's has £0 road tax and the first set of tyres lasted 35K.
 
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