V-brakes vs. Center-pull brakes
11-25-22, 10:35 AM
#151
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Ummm... no, it isn't.
You were wrong all along-
It was not a Pony, it was an Excel.
Pony was an unbelievably crappily made rear wheel drive car that was never sold in the US.
Excel was an unbelievably crappily made front wheel drive car that WAS sold in the US.
Maybe some of the other stuff you said was correct, but I can't be bothered to look if you don't have the respect for the history of Hyundai in the USA that I think is appropriate.
You were wrong all along-
It was not a Pony, it was an Excel.
Pony was an unbelievably crappily made rear wheel drive car that was never sold in the US.
Excel was an unbelievably crappily made front wheel drive car that WAS sold in the US.
Maybe some of the other stuff you said was correct, but I can't be bothered to look if you don't have the respect for the history of Hyundai in the USA that I think is appropriate.
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11-25-22, 12:05 PM
#152
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cyccommute Rolla sjanzeir Jeff Neese
'Direct pull' brakes are absolutely defined by the way the cable is oriented across the top of the arms. These brakes fix a design flaw with centre-pull cantilever brakes - that the more you pull on the brake, the higher the yoke goes and therefore the less leverage the brake has working to stop the bike. 'Direct pull' brakes have the cable pulling the arms straight together, so doubling force at the lever will approximately double the force at the brake, while doubling the force at the lever for a centre-pull cantilever makes some increase less than double the force at the brake. This is not to say cantis are necessarily bad brakes - I have had many great rides on canti equipped bikes on rough terrain, but decent quality V brakes (direct pull) were an immediate upgrade when they came out.
And how do we know that it is the cable orientation and not the amount of cable pull that defines linear-pull brakes? Because there are 'short pull' linear pull brakes for touring/Cx/bmx bikes that use the same short-pull levers as you would use with road calipers or cantilever brakes. There are also cable-actuated disc brakes that work with short pull levers. The difference between the brakes is the way the cable actuates the arms, not the amount of cable puleld.
'Direct pull' brakes are absolutely defined by the way the cable is oriented across the top of the arms. These brakes fix a design flaw with centre-pull cantilever brakes - that the more you pull on the brake, the higher the yoke goes and therefore the less leverage the brake has working to stop the bike. 'Direct pull' brakes have the cable pulling the arms straight together, so doubling force at the lever will approximately double the force at the brake, while doubling the force at the lever for a centre-pull cantilever makes some increase less than double the force at the brake. This is not to say cantis are necessarily bad brakes - I have had many great rides on canti equipped bikes on rough terrain, but decent quality V brakes (direct pull) were an immediate upgrade when they came out.
And how do we know that it is the cable orientation and not the amount of cable pull that defines linear-pull brakes? Because there are 'short pull' linear pull brakes for touring/Cx/bmx bikes that use the same short-pull levers as you would use with road calipers or cantilever brakes. There are also cable-actuated disc brakes that work with short pull levers. The difference between the brakes is the way the cable actuates the arms, not the amount of cable puleld.
Wikipedia - Bicycle brake
Since there is no intervening mechanism between the cable and the arms, the design is called "direct-pull". And since the arms move the same distance that the cable moves with regard to its housing, the design is also called "linear-pull".
When you have a straddle cable and yoke as part of the mechanism (cantilever, center pull), the brake arm response in relationship to the cable movement is not linear.
Last edited by Jeff Neese; 11-25-22 at 01:26 PM.
11-25-22, 01:20 PM
#153
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I always hate to reference Wikipedia because it just seems lazy, but in this case it's just easier. Again, it has nothing to do with physical orientation, and only about cable pull.
Wikipedia - Bicycle brake
Since there is no intervening mechanism between the cable and the arms, the design is called "direct-pull". And since the arms move the same distance that the cable moves with regard to its housing, the design is also called "linear-pull".
It's that 1:1 ratio of cable pull to brake arm movement that gives it the name linear pull. That's what it has always meant. A 1:1 ratio is referred to as "linear" in many other areas of physics, mechanics, electronics, etc. - not just bicycle brakes.
Wikipedia - Bicycle brake
Since there is no intervening mechanism between the cable and the arms, the design is called "direct-pull". And since the arms move the same distance that the cable moves with regard to its housing, the design is also called "linear-pull".
It's that 1:1 ratio of cable pull to brake arm movement that gives it the name linear pull. That's what it has always meant. A 1:1 ratio is referred to as "linear" in many other areas of physics, mechanics, electronics, etc. - not just bicycle brakes.
11-25-22, 03:29 PM
#154
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11-25-22, 04:03 PM
#155
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...I never use the brakes on my bike. They only slow me down.
...I never use the brakes on my bike. They only slow me down.
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11-25-22, 10:49 PM
#156
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It's really not. No more complicated than a regular Jimmy with the regular n/a 190hp 4.3 with rear or 4wd. The awd system ain't special it's a BorgWarner t-case chain drive with a 60/40 split shared with the Bravada Smart Trak and awd Astro/Safari they got the system from. The front axle is the same as the 4wd sans the locking hubs.
11-25-22, 10:52 PM
#157
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It's really not. No more complicated than a regular Jimmy with the regular n/a 190hp 4.3 with rear or 4wd. The awd system ain't special it's a BorgWarner t-case chain drive with a 60/40 split shared with the Bravada Smart Trak and awd Astro/Safari they got the system from. The front axle is the same as the 4wd sans the locking hubs.
11-26-22, 01:29 AM
#158
Rhapsodic Laviathan
