Bicycle Mechanics - Dura-Ace 7800 DT shifters on a Surly
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03-15-10, 10:06 AM
I'm building up a Surly right now, and I've been trying to go the eBay route for the build. I got a pair of Dura-Ace SL-7800 downtube shifters from a seller in Taiwan, but they only included the flat lever boss covers intended for alloy frames. Since it's going on a steel frame with small-diameter tubing, I need the rounded ones.
Right now, I have my local independent mechanic checking his parts bin for these, but if he can't find 'em, what are my other options?
Also, why would Shimano only include the flat ones? Are they sold under a different part number?
03-15-10, 10:20 AM
Shimano Dura Ace Downtube Shifters
Indexed or Friction
Includes Cables, housing and hardware
1 Pair/2 Shifters
This is what I got for my Surly LHT hope this help you out a little.
I got these at Amazon.com
03-15-10, 10:30 AM
Yeah, there's a lot of good reasons to go 9-speed, but I really want 10-speed so I can swap wheels back and forth with my road bike and not change cassettes. One of my wheelsets, the one I'll probably be using most on this bike, is actually 10-speed only, so 7800 or 7900 shifters are really my only (indexed) option. I want 7800 rather than 7900, because I already have a compatible FD. Shimano claims that the 7900 shifters won't work with earlier front derailleurs because of the revised cable pull; it may or may not work, since it's friction, but for an almost-all-new build, why chance it?
03-15-10, 11:29 AM
Ok I found this for you.You can get these at Amazon as well.Maybe this will help.Other than these I am out of ideal.
Shimano Dura-Ace SL-7800 10-Speed Braze-On Shift Levers
Other products by Shimano (http://www.amazon.com/s.html/ref=bl_sr_sporting-goods?ie=UTF8&node=3375301&brand=Shimano)
No customer reviews yet. Be the first. (http://www.amazon.com/review/create-review/ref=dp_top_cm_cr_acr_wr_link?ie=UTF8&nodeID=&asin=B001G0X6OK) | More about this product (http://www.amazon.com/dp/B001G0X6OK/ref=asc_df_B001G0X6OK1060180?smid=A282YC41QUNSEU&tag=dealtmp112703-20&linkCode=asn&creative=380341&creativeASIN=B001G0X6OK#moreAboutThisProduct)
List Price: $115.00 Price: $98.00
03-18-10, 12:43 PM
Wiggle.UK has the D/A 7700 levers for ~$44. I have a set on the way for a similar build. With DT levers you can use friction as well, if not better, than indexing IME.
Shimano claims that the 7900 shifters won't work with earlier front derailleurs because of the revised cable pull; it may or may not work, since it's friction, but for an almost-all-new build, why chance it?
Actually the SL-7900 shifters are not friction, they are indexed. Also the cable pull is the same as the 7800 series, only the brakes changed between the series which is why Ultegra 6700/DA 7900 shifters are optimal with Ultegra 6700/DA 7900 brakes. For shift only levers there should be no difference (the Dura Ace Gear Indicator for example works with 6600/6700/7800/7900 and cable-pull is exactly what it is measuring).
7700 series derailleurs had different cable pull, that would be more of an issue.
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