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Post by PrincessPunk on Apr 13, 2016 17:03:23 GMT
I'm not sure where to put this but once again I'm looking for information on brakes... just this time its pads. So, I'm not particularly hard on my brakes, most of the time I engine brake with just a little assistance from my brakes. That being said, the Divvy 900 is a heavy bike and I'm led to believe the brakes are not the greatest. Now, I was set on getting a set of goldfren pads but upon further inspection have been dissuaded from them, however I am still skint! So a set of EBC HH sintered pads all round is a bit above my price range and my concern with HH is, with being in Scotland and also not a heavy braker, I feel like these pads would never get warm enough to really do their thang as efficiently as the should and potentially be a hazard. With all this considered, my question is about Brenta GG pads as listed on wemoto. It says these are softer organic pads good for all rounding with a wide/lower operational temperature range. Obviously they will wear faster but balanced against being light on the brakes I think its a good deal, especially considering they're half the price! Can anyone advise me as to whether this is... well, advisable? Is there a good reason sintered pads appear to be the norm now? Will the weight of the bike in turn raise the operating temperature to "performance bike" levels? I apologise for so many questions but damn these brakes are kicking my ass! Any help is, as always, massively appreciated Much love, Sarah  |
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Post by HRHpenfold on Apr 13, 2016 17:11:08 GMT
I'm not sure where to put this but once again I'm looking for information on brakes... just this time its pads. So, I'm not particularly hard on my brakes, most of the time I engine brake with just a little assistance from my brakes. That being said, the Divvy 900 is a heavy bike and I'm led to believe the brakes are not the greatest. Now, I was set on getting a set of goldfren pads but upon further inspection have been dissuaded from them, however I am still skint! So a set of EBC HH sintered pads all round is a bit above my price range and my concern with HH is, with being in Scotland and also not a heavy braker, I feel like these pads would never get warm enough to really do their thang as efficiently as the should and potentially be a hazard. With all this considered, my question is about Brenta GG pads as listed on wemoto. It says these are softer organic pads good for all rounding with a wide/lower operational temperature range. Obviously they will wear faster but balanced against being light on the brakes I think its a good deal, especially considering they're half the price! Can anyone advise me as to whether this is... well, advisable? Is there a good reason sintered pads appear to be the norm now? Will the weight of the bike in turn raise the operating temperature to "performance bike" levels? I apologise for so many questions but damn these brakes are kicking my ass! Any help is, as always, massively appreciated Much love, Sarah |
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Post by PrincessPunk on Apr 13, 2016 18:10:38 GMT
Oh wow, now THATS cheap! Do you have any experience using them?
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Post by HRHpenfold on Apr 13, 2016 21:55:10 GMT
Oh wow, now THATS cheap! Do you have any experience using them? Yes but not on the D9, They work well. |
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Post by mlbv on Apr 14, 2016 1:17:56 GMT
i have never heard of people needing to get brakes up to temperature for them to work....
brakes get hot as a function of being used, they convert motion (kinetic energy) into heat, and the more heat you can put into them the more stopping force they have... that is the more you can heat them up... with standard types of brakes, as they get hotter, generally speaking, the less capable they are of slowing you down... think of them a bit like a battery or a bottle, to slow you down you have to charge the battery or fill the bottle with water, then as you come off the brakes, the charge from the battery or the water from the bottle leaks away (the brakes cool down) but the more often you use them, the more you are trying to top up a half full battery or bottle, until it is too full and can't absorb any more energy, this is when you get brake fade (the coefficient of kinetic friction gets smaller as the temperature goes up)...
higher operating temperatures of discs and pads don't mean they only start working when hot, it means they are still capable and CAN work when hot...
crap pads are just not very good at filling the reservoir with energy (the battery with electricity, bottle with water or in reality, the disc with heat) meaning they aren't as good at converting kinetic energy into heat and slowing you down...
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Post by m40man on Apr 14, 2016 7:22:39 GMT
... higher operating temperatures of discs and pads don't mean they only start working when hot, it means they are still capable and CAN work when hot... Exactly. GG are fine for the rear, though I prefer to fit HH. I always stick to HH pads on the front. I treat myself to EBC quite often , but am happy to use any brand & TBH I doubt in a blind test [1] that I or many others could tell the difference. [1] Do not test your brakes whilst wearing a blindfold  . |
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Post by HRHpenfold on Apr 14, 2016 7:43:44 GMT
GG are fine anyway, they are what the manufacturers fit as standard,
HH are fine as well, but are more aggressive on the disc, so will wear the disc out quicker,
operating temperatures only get into it with racing pads, in fact your more likely to boil the brake fluid than overheat the pads, and both types will operate as well under normal circumstances.
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Post by chris900divvy on Apr 14, 2016 9:27:13 GMT
Nothing wrong with Goldfren pads Sarah, I've been using them for years. The copper sintered pads have a great bite to them and personally I prefer them to the more expensive EBC organic pads anyway, EBC prices are always a little inflated. No issues with Goldfren copper sintered myself, decent price good wear life and they do the job perfectly well. I honestly think you are worrying far too much about the bike!
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Post by GAv on Apr 14, 2016 11:30:26 GMT
Sorry those theories do not extend to racing bikes and cars particularly the latter when brakes and tyres have to be at a working temperature to work efficiently, and when KERS, Kinetic energy harvesting would not be possible at lower temperatures, not only that but F1 cars that stored the converted heat, into electric power and after doing so the energy made the brakes temporary not as efficient.
Having done my steering ticket on a 56000 ton Tanker The British Husaar,I am here to tell you also my last Ford Thunderbird was not dissimilar in its handling or braking characteristics, as after 3 prods on the massive finned drums ,the linings couldn't cope, with latterly over 450 BHP, so you felt you needed a heavy object to throw out the window to stop, 6 pot Mustangs were just as bad so it wasn't a mermentumthing, hence the term anchors?
Next year 65 T Birds were the first American car to deeply front Discs, with 315 BHP and 2.5 tons to arrest, at first Ford had troubles with the fluid boiling, so there is a lot more to it than just keeping pads and linings cool to consider.
Mercedes deployed an air brake in the 50s on their SLR racers, in effect a shield that rose activated by a lever,and after a Healey hundred was forced into the path of one,which then took off sadly into the crowd of spectators.
Mark Webbers first attempt at Le Mans in a much later Silver Arrow resulted in a backflip in to the trees alongside the La Sarthe track so aerodynamics are also considerations especially when the down forces are also putting serious loads on the tyres and brakes, why pit crews wear heat proof mits.
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Post by PrincessPunk on Apr 14, 2016 11:32:11 GMT
Ah fair, i feel that most of whats going on in these reviews and forums is a case of 1) people not bedding the brakes in properly, 2) people being pedantic and 3) people doing racing speeds as their normal riding haha. Also there was some mention of there being people supplying fake goldfren pads? i'm not sure how true that is. and also mention of organic pads wearing to nothing in the wet, but that again i think is people racing.
I definitely wont be testing my brakes blindfolded! haha, not a good plan. I probably am worrying overly much, its just there is so much information to scare you (the "oooh you never buy cheap when it comes to brakes" but like, they're made to a standard right?) plus i'm on a tight budget so i want to get things right first time to save buying twice.
chriss900divvy do you use goldfren a lot?
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Post by chris900divvy on Apr 14, 2016 12:09:12 GMT
Ah fair, i feel that most of whats going on in these reviews and forums is a case of 1) people not bedding the brakes in properly, 2) people being pedantic and 3) people doing racing speeds as their normal riding haha. Also there was some mention of there being people supplying fake goldfren pads? i'm not sure how true that is. and also mention of organic pads wearing to nothing in the wet, but that again i think is people racing. I definitely wont be testing my brakes blindfolded! haha, not a good plan. I probably am worrying overly much, its just there is so much information to scare you (the "oooh you never buy cheap when it comes to brakes" but like, they're made to a standard right?) plus i'm on a tight budget so i want to get things right first time to save buying twice. chriss900divvy do you use goldfren a lot? Yes have used them for years and probably several hundreds of thousands of miles! I have no issue with them whatsoever they work well in wet and dry they last well, have good feel and the price is reasonable, have used them on many different bikes without issue the Diversion and my ZRX1200 both have them on at the moment. I always buy them on EBay and can't say I've ever come across a fake set! |
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Post by PrincessPunk on Apr 14, 2016 12:11:41 GMT
Awesome  glad to hear this because this saves me SO much money haha. down to 35-40 quid for a set instead of 60! do you have a seller that you recommend in particular? |
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Post by chris900divvy on Apr 14, 2016 18:55:17 GMT
Any of them will do though I had trouble with being supplied the wrong pads from AW motorcycle parts - ebay id 'imighthavewhaturlooking4' so maybe avoid them if you want them quickly!
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Post by PrincessPunk on Apr 14, 2016 19:20:32 GMT
Sweet : I ordered a service kit from M&P earlier this week and they seem good and have a set of pads for 35 quid so i think i'll go for that www.ebay.co.uk/itm/130888160710thank you for your help |
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Post by satnav on Apr 23, 2016 22:37:02 GMT
I know you are now sorted but for future reference I use the Brenta GG on the back.
Good pad but short life. Have just changed the last set after 7,000 miles.
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. 
glad to hear this because this saves me SO much money haha. down to 35-40 quid for a set instead of 60! do you have a seller that you recommend in particular?
