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-   -   Racer Tech Thread (https://www.bikeforums.net/33-road-bike-racing/956936-racer-tech-thread.html)

shovelhd 12-22-14 09:04 PM


Originally Posted by tetonrider (Post 17409673)
wouldn't that be 5T? i've heard of 3T and TTT before it, but 3TTT is new to me. :)

In the old days, the 3T bars were stamped 3ttt.

tetonrider 12-22-14 10:18 PM


Originally Posted by shovelhd (Post 17409690)
In the old days, the 3T bars were stamped 3ttt.

yes--i'd just never heard anyone call them that before.

"3T, originally known as TTT, was founded by Mario Dedioniggi in 1961 in Torino."

shovelhd 12-23-14 05:10 AM

We used to refer to them as triple T. At some point while I was fat and lazy it became three T.

ips0803 12-26-14 06:21 PM


Originally Posted by wens (Post 17408829)
Does anybody make classic bend (or at least not compact) 38 cm bars?

like this?

Zipp Service Course SL-70 Ergo Handlebar | Competitive Cyclist

ips0803 12-26-14 06:24 PM

this is that bend

https://farm4.staticflickr.com/3848/...e60895b1_c.jpg

Spoonrobot 12-26-14 08:22 PM


Originally Posted by wens (Post 17408829)
Does anybody make classic bend (or at least not compact) 38 cm bars?

There are some excellent suggestions above. If anyone is curious about a budget option Avenir makes an aluminum bar with almost the exact same bend as the Zipps pictured above. I believe the reach may be 2-3mm longer and the flat drop section does not extend rearward as far as the Zipps but otherwise they are identical, I was unable to tell the difference once they were mounted.

Avenir - Classico Road Handlebars, 380mm, Black

I run them on my track bike and in my experience they work fine.

tetonrider 12-26-14 11:07 PM


Originally Posted by ips0803 (Post 17417625)

wens may mean something different by his question, but typically classic/round != compact or ergo. those zipp bars are a compact reach. i do like zipp bars, though.

shovelhd 12-27-14 06:43 AM

Agreed. Those are compact bars.

ips0803 12-27-14 09:04 AM

Fair enough, the shape is more round than what I think of with compact but agree the dimensions are compact

shovelhd 12-27-14 01:23 PM

Compact doesnt have to be ergo. Ergo is not round.

carpediemracing 12-27-14 07:43 PM


Originally Posted by wens (Post 17408829)
Does anybody make classic bend (or at least not compact) 38 cm bars?

You looking for a more-than-12-cm-drop and more-than-7-cm-reach kind of bar?

wens 12-28-14 01:35 PM


Originally Posted by carpediemracing (Post 17419810)
You looking for a more-than-12-cm-drop and more-than-7-cm-reach kind of bar?

I was thinking more like 9 and 14. I might give the zipp 8 cm and 12? drop bars a shot, especially because I might be able to get a hook up on those that means I could break even selling them if I don't like them.

wens 12-29-14 09:52 PM

Follow up on my narrow bars, I'm going to give these a shot. The price is right and I think the shape is fairly similar to the tarmac bars I'm using now.
http://www.niagaracycle.com/categori...8cm-black-31-7

revchuck 12-30-14 04:59 AM

If you ordered the 38cm version, they'll be really narrow, since the Deda bars are measured outside-to-outside. I've got those bars on a couple of bikes and like them.

hack 12-30-14 03:54 PM


Originally Posted by tetonrider (Post 17404895)
no one can fault shimano cranks, but technically they're 2 bolts and they do have a threaded plastic preload adjuster (albeit the threads are metal). doesn't require the tool, but it is easier to adjust with the tool.

the sram bb30 crank is a 1 bolt setup (well, there is that 1.5 or 2mm set screw), and a tool-less preload adjuster. works out reasonably well. this is better than before they had that preload adjuster--you had to use nylon washers as spacers (in addition to the delrin 10mm spacer).

Stopped off at the new sponsor LBS today and they got me squared away on the crankset issue. Added a spacer and torqued the crankset down to where it should be and all the "play" is gone. Ready to roll with power again.

tetonrider 12-30-14 10:43 PM


Originally Posted by hack (Post 17426937)
Stopped off at the new sponsor LBS today and they got me squared away on the crankset issue. Added a spacer and torqued the crankset down to where it should be and all the "play" is gone. Ready to roll with power again.

excellent! glad you're back up and running.

what spacer did they add? were you missing one? curious if you figured out how many threads from "off" your preload adjuster was without the spacer.

hack 12-30-14 11:34 PM


Originally Posted by tetonrider (Post 17427901)
excellent! glad you're back up and running.

what spacer did they add? were you missing one? curious if you figured out how many threads from "off" your preload adjuster was without the spacer.

drive side has the 10mm spacer and the stepped washer. non drive side has a stepped washer, the pre-load, then 5mm of spacers (looks like 2 x 2.5mm spacers). it doesn't look like the pre-load unthreaded. Could probably get away with one less 2.5mm spacer if we opened the pre-load. will ride it around tomorrow and see how it feels.

tetonrider 12-30-14 11:41 PM


Originally Posted by hack (Post 17427985)
drive side has the 10mm spacer and the stepped washer. non drive side has a stepped washer, the pre-load, then 5mm of spacers (looks like 2 x 2.5mm spacers). it doesn't look like the pre-load unthreaded. Could probably get away with one less 2.5mm spacer if we opened the pre-load. will ride it around tomorrow and see how it feels.

cool cool.
are you saying the preload adjuster is not being used to add any preload at all now, or have i misunderstood?

hack 12-30-14 11:47 PM


Originally Posted by tetonrider (Post 17427995)
cool cool.
are you saying the preload adjuster is not being used to add any preload at all now, or have i misunderstood?

that's what it looks like. maybe one thread showing.

tetonrider 12-31-14 12:49 AM


Originally Posted by hack (Post 17428004)
that's what it looks like. maybe one thread showing.

IME with the sram bb30 cranks, it's pretty rare to get the spacers just right so that there is no preload needed.

if there is too much preload, you get more drag and bearing wear (it is material). you can test it easily by loosening the set-screw and backing off the preload. if you can't back it off at all, i'd pull the crank and test by removing one of those 2.5mm spacers.

shovelhd 12-31-14 06:05 AM


Originally Posted by tetonrider (Post 17428069)
IME with the sram bb30 cranks, it's pretty rare to get the spacers just right so that there is no preload needed.

if there is too much preload, you get more drag and bearing wear (it is material). you can test it easily by loosening the set-screw and backing off the preload. if you can't back it off at all, i'd pull the crank and test by removing one of those 2.5mm spacers.

My SRM must be one of the rare ones, then as preload is good with no spacers other than the drive side.

hack 12-31-14 04:54 PM


Originally Posted by tetonrider (Post 17428069)
IME with the sram bb30 cranks, it's pretty rare to get the spacers just right so that there is no preload needed.

if there is too much preload, you get more drag and bearing wear (it is material). you can test it easily by loosening the set-screw and backing off the preload. if you can't back it off at all, i'd pull the crank and test by removing one of those 2.5mm spacers.

took it out today for a few hours and everything seemed good. power numbers seemed spot on as well (I moved a Quarq spider from a GXP to a BB30 crank).

tetonrider 12-31-14 05:20 PM


Originally Posted by shovelhd (Post 17428288)
My SRM must be one of the rare ones, then as preload is good with no spacers other than the drive side.

so tough for it to work out just right with proper torque, no spacers & no preload via the adjuster, indeed!

shovelhd 12-31-14 06:56 PM

The thing going for it is that it's a high end frame, native BB30, and an SRM.

mike868y 01-12-15 06:59 PM

best adapter to run a compact crank on a pf30 bb?


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