Login required to started new threads

Login required to post replies

Prev Next
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [earthling] [ In reply to ]
Quote | Reply
I don't want disc brakes on a tri bike if I bought one.
But I don't want more, any sort of under BB brake, custom bullshit almost functional in front of, behind/inside the fork crap.
I want simple plain old road calipers and I am wiling to pay any aero cost for that.
After all, the S5 is a dam aero platform and it runs bog standard calipers.

I will take a good disc system over anything but a standard caliper on a TT bike anyday.
But I want disc on my road bike.
It lives in the mountains.

Carbon wheels are a thing; and one of the things is that a good mid depth carbon rim rides better than any aluminium rim.
Quite considerably so.
There is considerable flex and compression in the sidewalls that is just nice to ride.
They also generally support higher spoke tensions and don't have woodles in tension around rim joints.
I really enjoy building carbon rims over alloy, they are just nicer to work with.

I like the frictionless feel and connectedness that hydraulic brings, but that is not disc specific.
But it does seem to be that disc is fluid operated generally so I like discs more.
It allow very nice invisible cable runs, especially when combined with electro.

I don't understand peoples fear of bleeding or adjusting hydro.
It is quicker to flush and bleed a modern brake than replace cables on any internal run brake.
The pads self adjust, rotors are one nut to remove that uses the same tools that you already own for other jobs.
You can adjust the lever reach just like any other brake, you can adjust the freeplay.
You can basically set the brake up to feel any way you want it.

There is no merit in letting unresearched technology fear drive your buying decision.
There is also a really great case for buying well chosen 5 year old TT bikes for tri and simply not wasting your money.

But I just don't see any value in super expensive rim brakes to make up for shortfalls in the system.
Disc brakes have a foot in the door, not because they have improved out of sight, but because rim brakes have become such a pain in the arse.
The single biggest selling feature of rim brakes is simplicity, and this hardly describes any of the intergrated/custom setups of the last 5 years.

There are complaints that discs will not align with calipers when swapping wheels.
Well most cassettes don't align and most brake pads don't either.
Then you also have pad composition to worry about.

I don't need or want disc brakes on a TT bike, but if it gets rid of the current crop of crap functioning brakes, hodge podge of standards and time consuming maintenance than I am in.
As a bonus I get to have comfortable strong fast wheels built however I want just like we could 20 years ago.
No frigging way will I spill huge amounts of money for current rim braked wheels when I can build better disc wheels for a fraction of the cost.

Actually, I want to see tri-bikes disappear.
Drafting is rife, put everybody on training friendly, safe road bikes and let drafting become part of the equation.
It is unenforceable in any meaningful way now anyways, so get rid of aero brakes, have a road bike with uci shorty bars if you want and make cycling easier for everybody.
Tri bikes really have become too specialised for the majority of people to ride on everyday roads anyway.
Then we can all ride low maintenance disc braked carbon wheeled comfortable safe bikes.
The original tri formula has had it's day.
It has morphed into a horrible beast due to high participation rates and the drive for it to be a finisher event, not an individual race.
Let the road bikes rule.
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [pk] [ In reply to ]
Quote | Reply
I think what you people keep refusing to acknowledge is that BryanD has been doing “research” on this.

RESEARCH.
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [kileyay] [ In reply to ]
Quote | Reply
Sounds like I'm totally screwed.

I migrated my Tri setup to an Andean without considering the practical side of things. Now I'm faced with the issue of traveling. I came to this forum looking for answers on how to adapt my scicon bag to TA... Scicon sales office told me there is no solution but to buy a Scicon 3.0 but I'm not so fast to give up on it yet...

I used to ride a BMC TM01. Being one of the earlier "superbikes" with proprietary, integrated brakes, it had some issues. And by "issues" I mean the rear end of that bike was a TOTAL DISASTER (cue Trump voice).

- The horizontal dropout with those shitty adjusters were ALWAYS liable to go out of alignment, sending the rim left or right into the brake pads. Oh and when rim brakes rub, it is way worse than disc brake rub in terms of how much power it robs you
- The brake calipers themselves relied on a J-bend cable guide to work properly. These things wore out so fast and replacement was so hard to find that the calipers almost never returned properly. With that said, however, I had researched a solution using some after market cable noodles. Haven't tested but they may work

I agree 100% about carbon braking surfaces. HED Jet Plus is probably the best kept secret in aero wheels. They are half the price, lighter, just as, if not more, aero than just about anything other than Enves, and they have alu braking surfaces. I love them so much that I have a set of HED Jet 9 discs on my Andean and kinda regretting selling the set that I had on the TM01s TBH.

I've already parted out my BMC and I've only got the frameset left. Some guy actually bought it from me on this classified forum (link) but upon receiving it complained that the BB area had marks from chain drops and he didn't like that. I didn't want drama so I took it back. Now I'm debating whether to keep it and put a set of low cost components on it (thinking SRAM Red mech with R2C shifters). The thing is I don't have room or need two TT bikes. It ties up too much money and I don't have room in my tiny NYC apartment...

Ugh, sorry for ranting. If anyone can suggest anything for me I'd be happy to hear it. Or better yet, put me out one my misery and buy my BMC. I resurrected the for-sale post here.

#KISPERFORMANCE
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [azurebl911] [ In reply to ]
Quote | Reply
azurebl911 wrote:
- The horizontal dropout with those shitty adjusters were ALWAYS liable to go out of alignment, sending the rim left or right into the brake pads. Oh and when rim brakes rub, it is way worse than disc brake rub in terms of how much power it robs you

Any chance you were using titanium (or super-light steel) skewers? Those are a disaster on horizontal dropouts. I'm pretty big for a triathlete and I can't budge the rear wheel with a good skewer on the BMC TM. A titanium KCNC that matched colors perfectly was another story...

azurebl911 wrote:
- The brake calipers themselves relied on a J-bend cable guide to work properly. These things wore out so fast and replacement was so hard to find that the calipers almost never returned properly. With that said, however, I had researched a solution using some after market cable noodles. Haven't tested but they may work.

If anyone can suggest anything for me I'd be happy to hear it.

I tried a couple different ones with success. I think a flexible noodle was like $3-5 at the LBS and a 2" compression spring (surrounding the cable between the brake arm and eyelet for the brake noodle to 'open' the brakes) at the hardware store for $1 transformed the rear braking performance. I'm pretty sure that same noodle has been in use since 2015.
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [dangle] [ In reply to ]
Quote | Reply
Thx for the tip on TI skewers. That was in fact what I was using. For the life of me, I can't think of any reasons why these would be problematic though.

Anyways, any suggestions for a good pair of skewers to use?

#KISPERFORMANCE
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [azurebl911] [ In reply to ]
Quote | Reply
azurebl911 wrote:
Thx for the tip on TI skewers. That was in fact what I was using. For the life of me, I can't think of any reasons why these would be problematic though.

Anyways, any suggestions for a good pair of skewers to use?

There just isn't as much 'clamping force' with titanium rods or super lightweight skewers. With vertical dropouts, you would normally be okay because you're not relying on the clamping force for left right alignment. I *think* any steel rod skewer should be okay on the rear wheel for a horizontal dropout rear wheel being used for triathlon purposes. Anything heavy and non-aero should be perfect! Here's a good link that quickly explains it. I'm just using the stock Swiss Side skewer out back since it hasn't budged and holds a rubber band nicely.
Quote Reply
Re: Disc Brakes & the Concept of a "Forever" Rim-Braking Time Trial/Triathlon Bike [azurebl911] [ In reply to ]
Quote | Reply
azurebl911 wrote:
Thx for the tip on TI skewers. That was in fact what I was using. For the life of me, I can't think of any reasons why these would be problematic though.

Anyways, any suggestions for a good pair of skewers to use?

It is not that TI skewers apply less force, it is just that, when stressed by any tensile (or other) force, TI skewers will stretch considerably more than an equivalent steel skewer. And this allows certain wheels in certain dropouts to slip, or worse.

The ones I like with minimal steel-vs-Ti weight penalty and with excellent aerodynamics and usability are these zipp aero skewers, but with steel rods, not TI:



Advanced Aero TopTube Storage for Road, Gravel, & Tri...ZeroSlip & Direct-mount, made in the USA.
DarkSpeedWorks.com.....Reviews.....Insta.....Facebook

--
Quote Reply

Prev Next