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Originally Posted by TallRider
(Post 15880633)
It's at least a 20-year-old part. But won't the 8-speed front hub be incompatible with other modern components?
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Originally Posted by Burton
(Post 15881436)
Personally I'm not out to convince anyone. I figured out a long time ago that most people start with an opinion based on personal bias and simply look for 'facts' that'll justify their position.
But if long term durability is really an issue for you, there are a number of customers than come in the shop with bikes that date back to the 50's and 60's. They weigh a ton and most parts are discontinued but they're in near mint condition and will obviously last forever so of you wanna swap - maybe we can work out a trade for what you have now. |
GBM, Yeah there's a lot more lever movement involved than on the mountain bike's shifters when shifting to a larger cog or chain ring, but still it wasn't an issue for me.
Shimano may work the mountain groups similar to their road groups with out of date items. Two examples are the bar end shifters I use, one is Ultegra (8S) and the other Dura Ace (9S). They're shipped in boxes bearing the group name, but their part numbers are outside of the normal series number range. There is always hope. :) Brad |
Originally Posted by Medic Zero
(Post 15881562)
Snark much?
Until the 1980s, most derailleur chains were also bushing chains, but today, virtually all derailleur chains are of the "Sedis" bushingless design. Compared to a bushing chain, a bushingless chain is cheaper to make, is less likely to break under shifting load, promotes better lubricant flow inside the rollers, and creates more lateral flexibility for multi-geared bicycles. However, it also wears much faster and has slightly worse mechanical efficiency than a bushing chain. |
Originally Posted by jimc101
(Post 15878890)
Having had a quick look through the thread, there are a post about 12 speed, which doesn't exist for any type of drive train yet.
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I like the part "-COMPATIBLE WITH ALL GROUPS (CA-SH)". Cash IS compatible with groups, tires and etc. :)
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9-speed isn't becoming extinct, it's just moving down-market, like 8-speed did five years ago. I've been replacing 8-speed Deore shifters with Alivio for years, and nobody has complained yet.
And now it's time for 9-speed to get the Alivio treatment. |
Originally Posted by Chris516
(Post 15880489)
I can attest to this, since I have an 8-speed chainring, with three in the front, which gives me twenty-four gears. But I don't go higher than 22 in the gears. Because triangulating the chain for an extended period of time, stretches the chain links, and bends the teeth on the chainrings. A chain is easier to replace, than a multi-speed chairring.
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Originally Posted by HillRider
(Post 15880676)
Uh, "8-speed front hub"? What's that? Joking? If there is one component that hasn't changed in decades, it's front hubs.
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Originally Posted by jimc101
(Post 15882604)
This (12 speed) is bike vaporware, let me know when you can purchase this from anywhere! Not a single update since they announced back in 2012.
Unless the pics are just real good renderings... |
Originally Posted by Kimmo
(Post 15882695)
Vapourware it may be, but at least one example actually exists.
Unless the pics are just real good renderings... |
Originally Posted by rebel1916
(Post 15882473)
That is either a silly or a disingenuous argument. Because the system isn't designed to be cross chained, doesn't mean it is more gears than you need or can use. It means that 2 of the possible gears, somewhere in the middle of the range, should be used sparingly, if at all. I am really having a hard time believing that you made that argument with intellectual honesty.
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Originally Posted by Kimmo
(Post 15882695)
Vapourware it may be, but at least one example actually exists.
Unless the pics are just real good renderings... So its entirely possible TISO designed a 12speed system for road bikes that only works on mountain bike frames. |
There is another 10mm of widening for Tandems, Shimano makes a 145mm.. ..
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Originally Posted by gsa103
(Post 15885774)
If I recall Shimano said that 12-speed wasn't really possible without moving to the wider fork spreads currently used by mountain bikes. And widening further beyond that would be extremely challenging due the the driveline torque.
So its entirely possible TISO designed a 12speed system for road bikes that only works on mountain bike frames. Brad |
Originally Posted by bradtx
(Post 15885806)
I would be surprised if someone hasn't built a road performance frame w/135 mm OLD for testing. AFIK the only drop bar roadies using 135 mm OLD are the touring bikes.
Brad |
Originally Posted by Burton
(Post 15885700)
This is obviously a highly charged exchange of personal views and biases based mostly on wagon rut mentalities. Please take it easy introducing confusing stuff like facts and rational concepts. :beer:
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1 Attachment(s)
Originally Posted by bradtx
(Post 15885806)
I would be surprised if someone hasn't built a road performance frame w/135 mm OLD for testing. AFIK the only drop bar roadies using 135 mm OLD are the touring bikes.
http://bikeforums.net/attachment.php...hmentid=330995 I was happy to take advantage of it; that rear wheel, laced around a 7s 36h 600 hub, was indestructible. |
Kimmo, That's neat. Was the drop out spacing spec'd for that frame?
Brad |
Less dish, the better..
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Originally Posted by Burton
(Post 15881990)
"Until the 1980s, most derailleur chains were also bushing chains, but today, virtually all derailleur chains are of the "Sedis" bushingless design. Compared to a bushing chain, a bushingless chain is cheaper to make, is less likely to break under shifting load, promotes better lubricant flow inside the rollers, and creates more lateral flexibility for multi-geared bicycles. However, it also wears much faster and has slightly worse mechanical efficiency than a bushing chain."
So does that mean you don't really wanna swap your narrow 8 speed 7.1mm bushingless chain in for a wider 7.8mm 5 speed bushing type chain? :innocent: |
Originally Posted by bradtx
(Post 15887618)
Was the drop out spacing spec'd for that frame?
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Originally Posted by Medic Zero
(Post 15887990)
Who said I was running a vintage pre-80's chain? O.o
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Originally Posted by gsa103
(Post 15885774)
If I recall Shimano said that 12-speed wasn't really possible without moving to the wider fork spreads currently used by mountain bikes. And widening further beyond that would be extremely challenging due the the driveline torque.
So its entirely possible TISO designed a 12speed system for road bikes that only works on mountain bike frames. |
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