joejack951

Pics of what exactly?

Maelochs

Pics of the finished bike like that guy posted on Page Five.

joejack951

Yeah, I like that bike, too.

joejack951

So not even 200 miles on my bike and I'm ready to change something...because new HY/RD short pull conversion arms are here

• 11% shorter lever throw than prototype arms
• black anodized finish to match current TRP calipers
• tiny little set screw included so you don't have to swap it over from the stock arm, because 4mm x 4mm set screws are really hard to find when you drop them
• all black hardware, because black (once TRP finally delivers said hardware, unfortunately)
• backwards compatible with Shimano brake cable clamp hardware if you gotta have 'em now!

Just thought some of you would like to know. I will be installing mine this week and reporting back.

raisinberry777

Definitely keen on hearing how it goes. Seems like the new Campy Centaur + these new HyRds with the conversion arm could be a great poor man's Campy disc group.

Racing Dan

If you didnt already write about it. What is the TRP HY/RD like. Are they any good?

Maelochs

So .... after seven months of calculating, designing, machining, testing, redesigning, remachining, retesting ... they produce their own version of your product and all your work is for naught?

joejack951

Yup, as well as opening up the HY/RDs to older Shimano and SRAM groups and making an option for a Campy group and post mount disc frame. And people like me who simply prefer the look of the mechanical levers and don't see the need for full hydraulic braking (not that there was a Campy hydaulic option when I bought my Chorus group last year).

joejack951

I think they're awesome! Set up was easy, facilitated by the custom arms. Braking power and modulation is tremendous in the dry but no wet weather on this bike yet. I am currently using the stock TRP pads but plan to change to some Shimano B01S pads as I have heard rain and the TRP pads don't mix well. I am using Shimano RT-99 rotors, 160mm front and 140mm rear FWIW.

Also, keep in mind two things: I have been using an Avid BB7 mechanical disc brake on the front of my commuter/cross bike since 2009 (~25,000 miles with it) but have never used full hydraulic disc brakes. I might like full hydraulics better but I also am certain that the HY/RDs are a far better disc brake caliper than the usually highly regarded BB7 with which I have a ton of experience in all weather.

joejack951

Did I give that impression? I didn't mean to. The 'new arms' are simply a slightly revised version of my original design which I produced at a higher quantity now that it seems apparent I'm not the only one who'd like a pair. There is nothing to stop TRP from copying my arm design but I am guessing they have bigger fish to fry. Time will tell.

Maelochs

Okay ... good news.

How long til Shimano copies your arms and patents them?

redlude97

Why would shimano copy an arm for a caliper they don't produce?

joejack951

They probably see me as more of a threat to their business than SRAM or FSA...

rpenmanparker 

If they are copied, they cannot be patented. In fact no one can patent them now that they have been disclosed to the public. There may be some leeway in the USA for the rest of a year since they were first disclosed, but not internationally.

Maelochs

Was that your sense of humor I passed on the road back there? Someone dropped it apparently.

TRP would be to company to steal the design anyway ....

And if it came down to it ... they could buy my testimony pretty cheap.

If bike companies can sue businesses in towns after which races are named because they later named a bike after that race ......

WhyFi

How could someone drop something that never existed?

joejack951

Getting back on track here, below is a family pic of the HY/RD arms in my possession, from left to right: stock, prototype short pull, and production short pull



Another view:



If you look close enough you can spot the subtle differences (ignoring the color difference) between the two short pull versions. I'm happy with the tweaks (shorter pull is the only thing anyone would notice, the rest is just geometry to accept the TRP Spyre cable clamp and some simplification to reduce CNC cost) and there are no ill-effects like the cable rubbing on the caliper body. It's closer now than before but still clears by a good margin, more than I thought I'd have.

raisinberry777

Forgive my ignorance here about TRP's disc brake products, but does this mean the arm would also work on the TRP Spyre?

rpenmanparker 

Sorry. I tend to take stuff I read pretty seriously. Oh, but you knew that.

joejack951

No, not even close. The only feature shared between the two arms is that a cable clamps to both of them, and for my shorter arm the Spyre clamp arrangement worked out better than the original HY/RD. Other than that, they are totally different.

If you go back a few pages, you'll see that I did sorta start down the path of creating a short pull arm for the Spyre but due to geometry issues outside of my control, I don't believe a suitable design is even possible. I still may try just because, but given the conplexity of the Spyre arm and the risks associated with the design, creating something I could hope to sell is very unlikely.

Racing Dan

Thanks. I tried the TRP spyre on a cyclocross bike and wasn't too impressed and discarded the idea of mechanical discs. Maybe these will change my mind.

joejack951

I originally wanted to use Spyres almost solely for the weight savings, which is significant compared to the HY/RDs. I talked with TRP about pairing the Spyre with Chorus levers and they talked me out of even bothering due to cable pull issues. I have never used the Spyre on the road but based on other users I think it would have been acceptable but nothing like the feel offered by the HY/RD. I didn't mean to end up with these brakes but I am pretty happy I did.

oscarach

@joejack951 Can't PM you as I don't have enough posts. But how do I go about ordering as set of the short pull arms?

Maelochs

Yup ... JoeJack will be quitting his job and opening his CNC shop any day now.

joejack951

Job was quit over three years ago. I still do essentially the same stuff now as a self-employed mechanical engineer (product design) but the conversation is more along the lines of 'does this seem fun and interesting to you?' rather than 'here is what you will be working on next.' These short pull arms were mainly just for fun but if they can offset some of the cost of my build (or more likely fund a Power2Max for it) all the better. I don't do any of my own production machining/casting/forging/molding. I leave that to the people who know it far better than I'll ever care to. I get my kicks designing and prototyping.