Brake Mounts & Headset Specs- Technical Discussion

[TWeerts]

http://www.parktool.com/blog/repair-...dset-standards

check the chart near the bottom

[samnation]

If you are going to run a tapered fork or think you may run a tapered fork you will want to do a ZS44 top and ZS56 bottom, if the 1 1/8 is more your jive go ZS44 top and bottom.

[IthonEng]

Guys think you've gone a bit off topic. I appreciate the different types of headsets but wanted your opinions on preferred type, based on technical differences.

E.g - Zero Stack allows the front end to be lower - some people like, some not so bothered.

or 1.5 provides greater stiffness etc etc

[herbman]

Guys think you've gone a bit off topic. I appreciate the different types of headsets but wanted your opinions on preferred type, based on technical differences.

E.g - Zero Stack allows the front end to be lower - some people like, some not so bothered.

or 1.5 provides greater stiffness etc etc

i like the idea of a full 1.5 head tube, that way you can just buy the headset to match the steerer that you want to run.

[IthonEng]

Herbman, do you mean with full 1.5 you can choose to run either 1.5 or 1 1/8?

[herbman]

yup, full one point five. that way you can run a 1 1/8, 1.5 or any tapered combo inbetween, like 1.5 to 1 1/8 or giants 1 1/4 to 1.5 setup. just match the head set to the steerer and your away

[IthonEng]

Is 1.5 really required though? The reason for questioning its requirement is:

1 - Its an AM/Enduro bike - weight is important and its not developed to be sent over 50' gaps to hang up on or drop 20' to flat.

2 - For years, up untill recently, 1 1/8 has been sufficient. Ive never had a headtube failure on any bike racing DH and don't personally know of anyone who has. Not to say it doesnt happen though. But I think frame design can go a long way to eleviate the problem.

Im not interested in keeping up with the latest fashion, just developing something that is fit for purpose. So to me the 1.5 craze seems a little unnecesary.

Maybe I am wrong?

Also zero stack or conventional press in cups? I like zero stack - lower weight, lower/more comapct front end.

[Dogboy]

I prefer the ZS44/ZS56 headtube.

[Optimax150]

I would go for a full 1.5 headtube for more versatility. As for as break mounts there is no difference, just one extra piece for IS mounts, or for maybe for PM depending on size.
Maybe a little off topic, but your really overthinking things here. If you really don't know the standards search over the Internet, a bunch of info for you to catch up on. I can only imagine your next inquiry about suspension, breaks, cranksets, handle bars which in its own could be a monster for you.
Just my .02, there is plenty of info out there for you to find and catch up on the times.

[IthonEng]

On the top of low stack height there is the option for zerostack/integral or integrated.

I like integrated, again lowering weight over a standard integral/zero stack. But I cant help thinking that if there was damage to the bearing surface thats integrated into the frame, its not easily, if at all, fixable.

No one wants to replace their frame because the bearing surface was damaged. Thoughts on this?

[IthonEng]

Optimax, its not a question of 'knowing' the standards.

Its a technical discussion on pros and cons of the standards. Hence why trying to keep it on that track.

Essentially trying to get peoples input. As an individual you cant have tried, at least not for long enough, all the options to know the pros/cons. Collaboration helps everyone

[Sandwich]

Is 1.5 really required though? The reason for questioning its requirement is:

1 - Its an AM/Enduro bike - weight is important and its not developed to be sent over 50' gaps to hang up on or drop 20' to flat.

2 - For years, up untill recently, 1 1/8 has been sufficient. Ive never had a headtube failure on any bike racing DH and don't personally know of anyone who has. Not to say it doesnt happen though. But I think frame design can go a long way to eleviate the problem.

Im not interested in keeping up with the latest fashion, just developing something that is fit for purpose. So to me the 1.5 craze seems a little unnecesary.

Maybe I am wrong?

Also zero stack or conventional press in cups? I like zero stack - lower weight, lower/more comapct front end.

I cannot see any logic behind not going for a full 1.5" headtube, unless you have a steel frame. It gives you so many options. You can run reducer cups and have the equivalent of a zero stack (zs44) headset, or you can run a tapered headset with ZS on top, or you can run full 1.5, or you can run an extended cup
reducer headset, or you can run reducer cups and regular cups on top. The only thing it really can't do, I think, is a tapered zero stack top and bottom setup. Seems like most people are moving in that direction until the next standard is released, but I think most people would probably be ok with 5mm of cup sticking down from the bottom so they have the option of running any fork ever. 1.5 also allows you to really easily mess with geometry, with angled headsets.

Otherwise, I'd go with zs44/zs56 as you get most of the benefits.

[IthonEng]

Sandwich, I do see where you are coming from.

1.5 top & bottom does offer a whole lot of versability. I guess its not always a case of what is best, but where the trend is going.

[Optimax150]

Optimax, its not a question of 'knowing' the standards.

Its a technical discussion on pros and cons of the standards. Hence why trying to keep it on that track.

Essentially trying to get peoples input. As an individual you cant have tried, at least not for long enough, all the options to know the pros/cons. Collaboration helps everyone

For you knowing the standards will let you know what you want or looking for. If you don't know the standards you don't know what your looking for. Yes collaboration helps everybody but the person asking needs some sort of knowledge. If you don't know than just ask "what's up with nowadays headsets? Or break mounts?". Honestly I think if you would've done you research over the Internet you would have found your answers, or at least had more specific questions. Next your going ask the difference between a two pot and a four pot break caliper, sintered and organic break pads, a short cage or medium cage or even what's different about DH and FR frames?

[IthonEng]

Optimax - Sorry you've lost me. Im not here for an internet arguement or to impress you with my knowledge of the standards.

If you've got nothing useful to say, dont say it at all!