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Dolomite Fat Tire Derailleur Upgrade

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Dolomite Fat Tire Derailleur Upgrade

Old 11-21-22, 05:59 AM
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Todzilla
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Dolomite Fat Tire Derailleur Upgrade

Wife bought me a cool fat tire bike, but derailleur shifter is already kaput. Id like to go ahead and replace it and the derailleur.

Will any old seven speed derailleur work? Or do I need to match it to sprocket cluster and/or new shifter?

thanks!
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Old 11-21-22, 07:12 AM
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Yes, most shifter and derailer combinations will work fine. The key, really, is to ensure the shifter you buy is compatible with the derailer. There are some SRAM derailers that require a SRAM shifter because the cable pull doesn't match Shimano. But for the most part, any modern Shimano 6/7/8-speed derailer will work with any modern Shimano 7-speed shifter.

I presume this has a 14-28 freewheel on it, meaning the largest sprocket isn't all that large. Any 6/7/8-speed rear derailer will handle that fine...from a low grade Tourney up to an Acera or Alivio. 9-speed derailers usually pair well with 7-speed shifters and shift 7-speed cassettes or freewheels pretty nicely (I'm using some such combinations on my own bikes at the moment), but you'll generally have the best performance in sticking with a 6/7/8-speed derailer.
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Old 11-21-22, 01:36 PM
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Go with an Alivio mid or long cage derailleur and an Altus 7 speed thumb Shifter. HUGE upgrades over the stock tourney parts the bike came with. Install a new chain too.. the stock one will rust up easily and is "worn out" from the factory. KMC makes several better choices... X8 will be appropriate.

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Old 11-21-22, 01:44 PM
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Originally Posted by hokiefyd View Post
Yes, most shifter and derailer combinations will work fine. The key, really, is to ensure the shifter you buy is compatible with the derailer. There are some SRAM derailers that require a SRAM shifter because the cable pull doesn't match Shimano. But for the most part, any modern Shimano 6/7/8-speed derailer will work with any modern Shimano 7-speed shifter.

I presume this has a 14-28 freewheel on it, meaning the largest sprocket isn't all that large. Any 6/7/8-speed rear derailer will handle that fine...from a low grade Tourney up to an Acera or Alivio. 9-speed derailers usually pair well with 7-speed shifters and shift 7-speed cassettes or freewheels pretty nicely (I'm using some such combinations on my own bikes at the moment), but you'll generally have the best performance in sticking with a 6/7/8-speed derailer.
The bike came equipped with Tourney garbage, single low grade front chainring, Pre-worn junk chain.
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Old 11-21-22, 03:20 PM
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What has been said is largely true but don't put a ton of money into the bike it is a wally mart special and uses pretty poor components all over it. It was not designed to last and you could be chasing problems all over eventually which can be quite expensive vs what the bike is worth. Fine to keep it running but don't go too crazy as a full overhaul on a new bike is never something I want to do but would be pretty well required on something like this as many assemblers have never seen or heard of grease or their wallymart doesn't provide any so why bother.
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Old 11-21-22, 03:45 PM
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Originally Posted by veganbikes View Post
What has been said is largely true but don't put a ton of money into the bike it is a wally mart special and uses pretty poor components all over it. It was not designed to last and you could be chasing problems all over eventually which can be quite expensive vs what the bike is worth. Fine to keep it running but don't go too crazy as a full overhaul on a new bike is never something I want to do but would be pretty well required on something like this as many assemblers have never seen or heard of grease or their wallymart doesn't provide any so why bother.
Two important words to consider... "Wife" and "Gift".
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Old 11-21-22, 07:02 PM
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Originally Posted by maddog34 View Post
Two important words to consider... "Wife" and "Gift".
I get it but I am not going to be dishonest. I don't like to be dishonest unless it is someone buying a bike without their partner knowing then I am happy to print up a faux receipt.
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Old 11-21-22, 07:34 PM
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Originally Posted by veganbikes View Post
What has been said is largely true but don't put a ton of money into the bike it is a wally mart special and uses pretty poor components all over it. It was not designed to last and you could be chasing problems all over eventually which can be quite expensive vs what the bike is worth. Fine to keep it running but don't go too crazy as a full overhaul on a new bike is never something I want to do but would be pretty well required on something like this as many assemblers have never seen or heard of grease or their wallymart doesn't provide any so why bother.
Grease is provided, they just don't want to get their hands dirty,
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Old 11-21-22, 10:00 PM
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Originally Posted by SpedFast View Post
Grease is provided, they just don't want to get their hands dirty,
I would doubt that somewhat but who knows these days. I did have an old mechanic who did it for the holidays for some extra cash but sadly he moved away and I have lost touch. I would love to have asked him.
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Old 11-21-22, 10:06 PM
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Thanks to all! I use the bike occasionally, so I won’t be upgrading much, but the derailleur upgrade is key.
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Old 11-22-22, 11:26 AM
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Originally Posted by veganbikes View Post
I would doubt that somewhat but who knows these days. I did have an old mechanic who did it for the holidays for some extra cash but sadly he moved away and I have lost touch. I would love to have asked him.
I was being sarcastic. But while I have your attention, is that your Utube channel "Vegan Bike"? Just curious.
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Old 11-22-22, 11:53 AM
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Originally Posted by maddog34 View Post
Two important words to consider... "Wife" and "Gift".
This is key.
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Old 11-22-22, 02:20 PM
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Originally Posted by SpedFast View Post
I was being sarcastic. But while I have your attention, is that your Utube channel "Vegan Bike"? Just curious.
No I don't have a YouTube account or at least nothing I have used in 10 years. This is my biggest online presence that I am active in really.
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Old 11-22-22, 05:09 PM
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Originally Posted by veganbikes View Post
I would doubt that somewhat but who knows these days. I did have an old mechanic who did it for the holidays for some extra cash but sadly he moved away and I have lost touch. I would love to have asked him.
assemblers grease NOTHING.. all bearings are in place in the box. The one assembler i met was doing so at $7 Per Bike. He was working for a sub-contractor that sent people to any box store that needed bikes put on the sales floor. install bars/stem, slap in the wheel/s, check that the brakes work, hang a tag or two, and out the door.

the most common issues on walmart specials? LOOSE Rear axle sets, TIGHT front axle sets, LACK OF GREASE on al the bearings, and the absolute worst chains ever sold.

and i've found a half dozen FORKS set up backwards to the Handlebars...

Last edited by maddog34; 11-22-22 at 05:15 PM.
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