RobbieTunes

I see no advantage to them, and though I've seen them at Fiesta, I've never seen anyone actually put their hands down there.

canklecat

Yeah, I seem to recall seeing a photo of Greg LeMond on a bike with Scott drop-in bars, but couldn't find a photo or video of him actually using them.

Seems like bar end shifters could work. Not sure about the handling but I guess you can get used to anything.

texaspandj

Ive seen a couple of versions of the drop ins. The regular like sloar had on one of his bikes a few pages back and another that came close enough to be joined with a bridge attachment.
Tthe concept is the same as aero bars, to draw your elbows closer together. This was to be used in solo breakaways in road races. I think as C-Cat said you get used yo anything.

On another note, thanks to Doc, RT, and markwesti for your input and suggestions, yall guys are the best.
One last thing on the aero bar gripshift. It's not the same as what's found on cruiser bikes. It's a different design but same concept. Reportedly the first generation (which I had) were Not Sram but very shortly after they were, including the three versions I have today. The original version had a regular diameter so they could fit regular road bars and we're aimed at riders that were used to using barcons. They were solid at the top nothing like today's models, you even had to drill a hole in your handlebars to run your cable through. Apparently someone came up with the bright idea to use them on the original scott aero bars like the aero bars I have. These are regular diameter so no problem. But after Greg Lemond '89 TDF win, the add on attachments went full production and because of a rule change (you couldn't have open end bars facing forward) they made them with a hole at the top so you could slide a bar through them and install a neon color bridge (which eventually came in hot pink, yellow, and black).
Anyways, that's why they were sold for different components like, campy shimano, and suntour. The weird thing is they also came for specific shimano and campy sets like 105, 600, and dura ace and chorus, record and so on. And finally in small diameter to fit the small diameter mass produced scott aero bar attachment.
I had mine in '88 and Scott Molina used the exact setup as me to win the Hawaii Ironman that year, Dura Ace 6 speed. I've got a pic of him I'll try to find and post.

texaspandj

This is identical to the original,I had however mine didn't have the grip tape it gad ridges. So possibly I had pre sram. Note the enclosed top.they eventually came in 7 speed and neon.


These are the ones I have now. Notice the attachment bridge. These came in 7,8 speed and for different companies.


Finally these are what are commonly used today. Mostly on cruiser bikes and probably all shimano.
​​​​​​​As a follow up and possibly a clarification.

TXsailor

Wheels and Sugino 165 triple crank arrived courtesy of SeyPat & SeedsBelize


The frame is looking better I have most of the scratches touched up and the white oxidation buffed off. It actually a little shiner that it shows in the picture and still needs some work but its going to look pretty good.
I have most of the rest of the parts ordered and all the parts we are reusing cleaned up and ready to install. For now its going to be 6 or 7 speed but if she likes it as much as I hope she does we may go 9 or 10 speed in the future.
Thanks again Saypat SeedsBeleize & RobbieTunes for helping with this project. She is excited

seedsbelize 

Well I am excited too,to be a part of this.

RobbieTunes

We do this while the Italian guys are still fighting about purity.

canklecat

The only grip shifter I can recall using is the low end Shimano RevoShift on my comfort hybrid/errand bike and some popular comfort cruiser type bikes. I think one used bike I tried a couple of years ago may have used SRAM instead. Better quality but felt the same when shifting.

The RevoShift work fine, but are cheaply made and need to be replaced every few years depending on use and outdoor conditions. It's mostly plastic and eventually pawls break and it won't shift smoothly anymore. I paid $10 or less for a replacement set with cheap cables/housings just as a backup.

But the right/rear derailleur grip shifter is fine. The left/front needs more wrist power to move that front derailleur. It would be even more awkward in the TT aero bar position, at least with my achy old wrists. Not sure whether that's a factor with most time trials since you're probably in the big ring the entire ride. One of my favorite TT segments here is 6 miles and ends in a roller coaster with an increasingly steep series of short but steepish climbs. A couple of times when I didn't have a tailwind I might have shifted to the small ring, but I usually try to avoid that.

texaspandj

Yeah with the original gripshifts some had issues with having to twist their wrist too much. So the next version pretty much fixed that. Eventually the gripshift faded out of favor. Mostly I believe because the age groupers follow pros and component sponsored pros like Dave Scott, Mike Pigg and Mark Allen had to use the attachment that allowed you to use regular down tube shifters and then eventually moved to bar end shifters when the components companies caught on. I think the gripshift are efficient and aerodynamically better plus they look cool and different. ..oh looks smooks.

texaspandj

^^^That is Some solid knowledge there.
Given that does anyone know if the 7 speed 6400 tri color rear derailleur (oem on the '88 '89 Master IM) has a different pull ratio than the 8 speed 6401 tri color rear derailleur?
I use the 6401 on my '89 but for 7 speed. It is Awesome, so smooth, and precise. I don't even want to take it off to try it out on the Carbon for the 8 speed gripshift. But.. I will when I get me a dura ace 7700 rear derailleur and 7700 braze on front derailleur for my '89 Ironman.

top506

Same/same.

Top

fleslider 

all of the Shimano SIS derailleurs have the same pull except for the 7400 Series Dura Ace.

texaspandj

Well I transferred the 7 speed gripshift I had on my Miami Vice on to the Carbon Ironman. It shifts fine no issues.
Two years ago I used my Miami Vice for a few triathlons and it had the oem DT shifters and I wished I had the gripshift and since I'll be using the Carbon Ironman this season I need the gripshift.
So now I'm reinstalling the OEM 105 group back on the Miami Vice sans the downtube shifters (I gave them away) instead I'll be using Dura-Ace 7 speed DT shifters. Well back to work... uh on the Miami Vice.

RobbieTunes

I have a set of 1050 DT shifters from an '88 Expert. Just sitting here.

RobbieTunes

Here you go, one shifter for both derailleurs. I'll bet there's math involved.

seypat

You know I have multiple sets sitting around collecting dust.

RobbieTunes

Mine go either to Tex or to the swap meet on Saturday. Maybe I can get a cup of coffee out of them.

Dude, that crankset! you had to laugh putting that in the box! Bars are already mounted.

We need to make a list of the organ recipients from that bike.

seypat

Do you want a set? I owe you a favor anyway. PM me with an address and I'll send you a set. Include the details with exactly what you need.

seypat

A little salt spray doesn't hurt. How about those derailleurs! Calipers are in pretty good shape also. How about the plastic spindle sleeve? That thing looked brand new. I did get a chuckle including the old cables and bar tape I figured you could use those for setup tests.

RobbieTunes

They're cleaned up now. I actually considered using that cable housing for a project I can't discuss just yet, but it would just not work. the cables were surprisingly clean and slick, so I'll likely use them on another Centurion....

I laughed at the bar tape. I restored a yellow-white Master for a friend, and he insisted on me finding the same bar tape. That stuff is so bad, even the mice won't chew it.

seypat

Look at the wheels that went to Txsailor. They need some cleanup from being at the beach, but look at the brake tracks on the rims. That bike was not ridden a lot.

RobbieTunes

Yep, no corrosion on the bars. A couple of nicks. They're already on the Comp TA

TXsailor

Yep those wheels don't show much wear and will clean up fine.

texaspandj

Thanks RT and Seypat for the 1050 DT shifters offer. I probably should take you up on the offer in case I ever want to take my Miami Vice completely back to stock including handlebars (which I have). But someone else will probably need them before I do. But thanks guys, however I might be wanting to borrow seypats bottom bracket retapping tool as I have plans to remove my Carbons crankset today and I think I may need it.
I'm not overly familiar with bike forums but I do recognize the generosity from members of the "cool kids club" and I think it's just superb the way we we keep the Irongents freewheels turning. From @markwesti and his offer to mill down a metal part for me to members finding complete Ironman bikes for fellow members and to practically building bikes with donations from all members, just truly amazing. I just can't help but to think how lucky I was to get the Ironman-itis back in 1986.

seypat

Are you talking about a Crank Arm Thread Chaser like this? If so, PM me an address and it will be sent. For those following, I have a crank arm thread chaser if anyone needs to use it. Here is a PSA announcement for those that don't have much experience pulling cranks. If those threads are a little iffy and you can't get the crank puller to screw in all the way, do not try to pull that crank. You'll strip it. Borrow/get a thread chaser and clean up the threads until you can get the puller in there without forcing it. No project is too urgent to ruin a good crank.

https://www.amazon.co.uk/Bicycle-Res.../dp/B001PTALQ8