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Disc levers + rim brakes?

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Disc levers + rim brakes?

Old 02-16-19, 04:20 PM
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Disc levers + rim brakes?

the stepkiddo picked up one of the road road bikes recently blown out by Performance, he is young so he went cheap, Fuji Sportif 2.5. it's far nicer than any bike he has had before, but it's a pretty basic spec. he has a 7-speed drivetrain with rim brakes and old-style shimano brifters, wherein there is a thumb lever on the side of the hood.

wifey and i have bottom feeder gravel bikes, they are 8-speed shimano claris setups with TRP disc brakes. so i am wondering... if we upgrade the gravel machines to sora or tiagra, that would liberate a claris group for the fuji. the question is... would the disc-ready claris levers be able to safely operate the rim brakes?

https://archive.fujibikes.com/2018/Fuji/sportif-254
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Old 02-16-19, 04:53 PM
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TRP Spyres are road disc brakes and have the same short pull as a pair of sidepull rim brakes and cantilever brakes. Any lever paired to them would work fine for that. If you are going to upgrade go 105 or higher. Sora and Tiagra are a bit better than Claris but not really by enough to make them a worthy aftermarket upgrade. If you were buying new bikes then spec'ing Tiagra is fine, it has certainly improved over the years but I don't see it as a worthwhile upgrade from Claris.

Shimano has never done thumb shifts on their "brifters" aside from on the bottom end Tourney stuff just FYI. It was not an old school thing the old school is relatively the same as today except the cable routing is a bit different going internal to make it more aerodynamic and way cleaner. The main company that does the thumbshifting on the "brifters" is Campy but the only reason to compare the two is as a joke (it really angers the Campy diehards) even Campy's lower end stuff is better than tourney and many similar lower end groupsets.
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Old 02-16-19, 05:05 PM
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Sorted out the cable pull types yet ? Road: short pull vs Mountain: V type long pull


TRP disc, cable, mechanical Spyke is the long pull Spyre the short
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Old 02-17-19, 12:38 AM
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Originally Posted by veganbikes View Post
Shimano has never done thumb shifts on their "brifters" aside from on the bottom end Tourney stuff just FYI. It was not an old school thing the old school is relatively the same as today except the cable routing....
i do not recall seeing a Tourney label, but his levers look like this pic below. they seem old school to me because a friend has Sora on her roadie machine from about 12 years ago and it has levers like this. but Sora now has the baby lever snuggled in behind the brake lever, same as the higher end groups. hmmm, i wonder if her bike is a 7-speed...

Originally Posted by fietsbob View Post
Sorted out the cable pull types yet ? Road: short pull vs Mountain: V type long pull
the disc brakes in question are TRP Lyra, but it sounds like this detail does not really matter. a cable brake on the road brake is a cable brake on the road, as far as the lever is concerned, yes?

Originally Posted by veganbikes View Post
If you are going to upgrade go 105 or higher.
funny, you were probably typing what i was thinking a little while ago, which is, might as well upgrade hydro. maybe 105, tho i didn't realize that there was a tiagra-level hydro when i started this thread. hmm....

i am a compulsive upgrader, i need to get a grip. i think i won't upgrade our bikes, we use them around town and need to be able to lock them up in random places. i don't want to stress about it while i'm in line at the post office. but my brother has the same bike, i'm sure he would appreciate hydros...

Last edited by kevrider; 02-17-19 at 12:43 AM.
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Old 02-17-19, 11:24 AM
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OK not the premium TRP, OEM Tektro lyra brakes are what they ship to factories .. by the thousands
single moving pad, and a fixed pad..


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Old 02-17-19, 07:52 PM
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Originally Posted by kevrider View Post
i do not recall seeing a Tourney label, but his levers look like this pic below. they seem old school to me because a friend has Sora on her roadie machine from about 12 years ago and it has levers like this. but Sora now has the baby lever snuggled in behind the brake lever, same as the higher end groups. hmmm, i wonder if her bike is a 7-speed...


the disc brakes in question are TRP Lyra, but it sounds like this detail does not really matter. a cable brake on the road brake is a cable brake on the road, as far as the lever is concerned, yes?


funny, you were probably typing what i was thinking a little while ago, which is, might as well upgrade hydro. maybe 105, tho i didn't realize that there was a tiagra-level hydro when i started this thread. hmm....

i am a compulsive upgrader, i need to get a grip. i think i won't upgrade our bikes, we use them around town and need to be able to lock them up in random places. i don't want to stress about it while i'm in line at the post office. but my brother has the same bike, i'm sure he would appreciate hydros...

I guess other stuff in their lower end levers used the thumb shifters. A lot of times for OEM spec they will use unbranded stuff that is of the same quality (or lack thereof) as the branded stuff. By branded I mean 105 or Ultegra logos not Shimano branding because it will have one or the other.

I would upgrade, if you lock up your bike properly with a good high quality lock somebody cannot easily take it. Plus you will or at least should notice a huge upgrade in shifting and braking quality and performance that way you might want to ride the bike more.

ABUS makes some excellent locks that are easy to use and lightweight but still offer a lot more protection over the competition (thanks to making their stuff in their own factories with virgin steel and doing a lot of testing on locks amongst other stuff) Pair that with Pitlock systems for locking other parts of the bike and you have a pretty solid theft proof set up. I also promote the idea of having your name on the bike as well as identifying stickers that make your bike less of a target. Thieves want something that looks like everything else plain jane off the peg, if your bike is unique they are less likely to want it and you are going to more easily recover it.
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Old 03-25-19, 07:31 PM
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it looks like i have another reason to upgrade our gravel bikes... we are going to use them for our touring and the claris shifter cables launch from the side of the levers, right into the space where a bar bag needs to ride. i am going to stick with upgrading to tiagra since the hubs can handle 10-speed.

the question now is... can i run a 10-speed chain over the 8-speed chainrings?
tks

ps - confirmed, kiddo is has those Tourney levers in the pic above.
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Old 03-26-19, 10:47 AM
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the question now is... can i run a 10-speed chain over the 8-speed chainrings?
you can perform a simple test, : take a 10 speed chain , and slip it over the chainrings of your existing crankset..
does the chain settle well, over the teeth?

yes ,, it's a Go, ... no? you can buy new chainrings with the teeth machined thinner... in the front :'speeds' are 1~3..

Roller width at some point, * stopped getting thinner , then the side plate steel thickness was reduced ...
to pack more of the cassettes cogs, in a limited width..


* a historian on the topic, I am Not..





...



...
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