Questions tagged [drivetrain]
Questions about a bicycle's drivetrain system, including the chain, gears, chainring, derailers, etcetera.
298
questions
8
votes
2answers
243 views
Gates CDN - frequent belt failures
I ride a belt drive bike fitted with a Gates CDN front sprocket (on the crank), a CDN belt and a CDX rear sprocket. Around the 2200km/1400mi mark, the CDN belt failed and teeth started snapping off (...
2
votes
1answer
56 views
11t sprocket compatibility between Shimano 105 and Ultegra
Specifically, can an Ultegra r6800 11-speed, 11t sprocket replace the 11t sprocket on a 105 r7000 cassette without issue?
3
votes
2answers
69 views
Can I use a 10 speed Campagnolo Crankset with a 10 speed Shimano drivetrain and chain?
I'm looking at rebuilding an older Cervelo R3 which had a Campy Record setup. Most of the gear is pretty old now and probably needs replacing, and I have a set of race wheels which are set up for ...
-1
votes
4answers
2k views
Has anyone here ever threaded the left end of a rear hub? (To add a left-side freewheel)
I have found endless opinions on mass-manufactured hubs that are either left-side-threaded or 'reversible' or etc. I am not seeking information or opinions on these.
I am also aware of the available ...
0
votes
1answer
72 views
Help with drivetrain decision [closed]
Currently upgrading my old steel mountain bike for commuting. I need some advice on what drive-train to go with. Current setup is 3x7. I will convert to either 1x9 or 1x10 with new rear wheel/hub. I ...
2
votes
2answers
93 views
1x7 mtb electric conversion?
I picked up a '93 Marin Bear Valley SE from a vintage store and spent time restoring it (surface rust, old components etc). I was pleased with how it turned out and enjoyed riding it, nice old steel ...
1
vote
0answers
137 views
Is this FD compatible with this crankset: 2 teeth too few
TL;DR:
Q: Can I use an SLX FD on an all SRAM rig?
A: Usually not. In the current case Trek Slash 7 2013 & Shimano M786 - no adjustment sufficed to produce a noise-free ride.
I am a proud owner of ...
3
votes
1answer
85 views
9 speed cassette and shifter with an 11 speed derailleur, will it work?
So recently my uncle gave me a Deore M5100 11 speed RD, but my current setup uses an Alivio shifter with a LTWOO A5 elite RD and an 11-46T cassette. While yes the LTWOO RD is designed to handle a 46T ...
5
votes
2answers
284 views
Compound for freewheel locking sprocket threads
I have an oldschool SunTour 6-speed freewheel, where the smallest sprocket screws on the freewheel body to lock the larger sprockets in place.
It's a normal right hand thread, so as you pedal in the ...
13
votes
3answers
2k views
Whatever happened to the 4 x n derailleur drivetrains?
Around the mid-1990s I am positive I remember seeing bikes with 4 x n drive trains e.g. 28-speed (4 x 7 gears).
There is nowadays a trend towards just 2 or even 1 front sprocket e.g. 1 x 12. More than ...
0
votes
2answers
243 views
Crankset and derailleur
Iam checking out my new mtb for it's parts.
How can I be sure, the cagelength on the rearderailleur it has the right lenght for a derailleur. The difference between the large and the small on the ...
1
vote
1answer
54 views
120 BCD Chain ring compatibility
I am converting my merida silex from fsa omega bcd 120/90 bcd 2x9 to a 1x9 drivetrain. I am keeping the cranks and bottom bracket and trying to only change the rings.
There are not many 120 bcd narrow ...
4
votes
3answers
103 views
New freehub body causing chain slack and ghost pedaling
I have replaced my freehub body like-for-like. Now when I freewheel, the top part of the chain goes slack and the pedals spin when I take my feet off them.
This usually occurs on old gunked-up ...
4
votes
3answers
731 views
Clicking in a certain gear with SRAM drive train
I have a new bike with exactly the same problem and same drivetrain (SRAM GX) as shown in this video:
(not my video).
When pedalling with the chain on the 5th smallest ...
4
votes
2answers
342 views
Is Shimano 11 speed crankset compatible with 7-speed cassette?
I'm upgrading an old folding bike (Dahon Speed). It currently has a 7 speed shifter and a Shimano 105 RD. However I haven't decided whether to stick to flat bar or change it to drop bar. I'm wondering ...
2
votes
2answers
83 views
Noise when powering down on left crank only
This one is a mystery to me. I ride a carbon road bike and just recently a clicking noise has developed when I push hard on the left side crank only (right side makes no noise). I have tried different ...
0
votes
3answers
297 views
3x9 versus 1x12
I don't know much about bikes.
I bought a "Kona Dr. Dew" 10 years ago, it has a 3x9 set of gears. The front rings large and small have 50 and 30 sprockets, and so I guess that's (9 * 50 / 30 ...
0
votes
2answers
143 views
21 speed to 12 speed conversion! Is it possible?
I have an entry level MTb with 21 speed gear ratio. I found out that i dont need that kind of complexity while riding. 12 speed seems light and compatible to my riding style. It has Shimano tourney ...
0
votes
2answers
83 views
Possible Maximum Gear Ranges of Each (3?) Possible Triple-Geared Drivetrain
I'm looking for the absolute maximum possible gear ranges from the known/possible triple-geared drivetrains, such as the strategy noted on TrikeTech.com. This involves pairing each of the three known ...
1
vote
0answers
77 views
Other Dual Drive hubs than Sturmey Archer or SRAM?
I'm looking for a dual drive type hub. At least that's what SRAM calls them. Hubs that are both internally and externally geared. SRAM and Sturmey Archer are the only manufactures of this class of ...
6
votes
0answers
202 views
Why did Shimano change their rear derailleur design going from a torsion spring to a tension spring inside the parallelogram?
The older Shimano rear derailleurs (pre 7700) use a torsion spring inside the parallelogram. But with the release of the 7700 group they switched to a tension spring which they continued using ever ...
11
votes
3answers
3k views
Can a counterfeit Shimano chain be used on an authentic Shimano drivetrain?
I accidentally purchased a fake CNHG901 HG-X11 Chain for my Shimano 2x11 M700 Groupset because my original chain already had 0.75 wear. I was naive and stupid to think that I'd actually get a ...
16
votes
3answers
3k views
How many watts are lost when pedalling on Bosch e-bike without a motor/electricity?
When pedalling a Bosch e-bike when its motor/electricity is off, how many watts are lost compared to non-ebike drivetrain?
If it differs, let's assume a Bosch Performance CX and 250 watts input power ...
13
votes
3answers
647 views
Why are cassettes replaced more often than front chainrings and derailleur jockey wheels?
On a bike there are three kinds sprockets that the chain comes into contact with: the chainrings, cassette, and derailleur jockey wheels.
It seems that the standard practice is to replace the cassette ...
10
votes
2answers
1k views
Upgrade drivetrain to allow faster top speed
I have a bicycle with a Shimano Altus 2x9 drivetrain. It has 36 and 22 tooth chainrings and a 11-34 tooth cassette.
I am hoping to upgrade this to extend its high range (i.e. 36/11) without ...
0
votes
1answer
86 views
Should I Upgrade my MTB Rear Derailleur? (After Crash)
I mashed my 8 speed Shimano Acera rear derailleur in a crash over the weekend and need to get it replaced. Is it worth spending a little extra money and installing a slightly higher-end derailleur, ...
7
votes
2answers
1k views
How to adjust drivetrain so I don't pedal empty air?
You might know what I'm talking about: coast a bit, then start a pedal stroke, and there may be zero resistance for a part of the cycle (let's say 30 degrees) like you're pedalling empty air. Then the ...
0
votes
1answer
115 views
Rear wheel not aligned with frame but cog and crank is aligned
My bike was previously a 26er mtb 3x7speed and I converted it now to be a single speed freewheel bike.
Is the bike safe to use if the rear wheel is not straight to the frame? It is closer to the drive ...
2
votes
4answers
5k views
Shimano 8/9/10 speed freehub conversion to 11 speed does not appear possible due to changed spline pattern
After remaining unchanged (with a few exceptions like FH-7801) for nearly 20 years the Shimano freehub body spline mount has changed along with the width. I had hoped I could refit a 8/9/10 speed ...
2
votes
2answers
92 views
Drive chain swap clarifications
Been thinking about upgrading my drive train, however, I'm not sure if I've fully understood the compatibility part and wanted to get some more clarifications. Currently have an Advent X (10spd) and ...
6
votes
2answers
296 views
What are the long-term effect of riding with a chain that's too short?
I bought my bike late November 2017, and have been riding it with the same chain ever since. I've only done very light riding with the longest rides I've ever done amounting to 60km. Last week, I took ...
2
votes
6answers
630 views
Increase bicycle resistance? [duplicate]
I'm riding a lot with my girlfriend. We just ride - no training or such. Yet I do like to train. The intensity I normally ride with her is not enough for any training benefit. I guess adding weight ...
-1
votes
1answer
70 views
Gears slipping when back peddaling
So i was out on my bike racing this weekend and i had a pretty fun time but on one of my practice runs my chain fell off so i quickly got off and put it back on and worked perfectly fine from there. ...
-1
votes
1answer
49 views
Chainring compatible
i have a Alivio m3100 Cassette cs Hg400 (12-36T) and m3100 rd, can i installed a 2x crankset Gxp (28-38T) on my drivetrain alivio???
1
vote
1answer
274 views
Difference Between SRAM SX eagle chain and SRAM NX eagle chain(12 speed)?
I have a Trek X-Caliber 8 with a SRAM SX Eagle 12 speed drive train, but I only have a SRAM NX Eagle chain. What is the exact difference between the two chains, and how can I modify my chain to make ...
15
votes
6answers
68k views
Bike is shifting on its own
Ever since I got my bike (Surly Long Haul Trucker), it has been prone to shifting on its own. This is almost guaranteed to happen when I stand up on the pedals, and happens regularly when sitting as ...
0
votes
3answers
311 views
Custom/modified Drivetrain 2x/3x Considerations and Planning
Planning a drivetrain setup for a new bike:
Currently running old Shimano 3x9 44/32/22t on 11-34t, which gives me 19-115 gear-inches (about 620%).
I used 29x2.0, 170mm crank to calculate my current ...
4
votes
1answer
131 views
What is the source of BB area creaking associated with ambient temperature changes?
A general answer would be welcome, maybe encompassing -10C-40C/15-100F temperatures, but my particular ride is an aluminium frame with pressfit BB30 and Tiagra commponents, in Scotland's climate, ...
0
votes
2answers
40 views
Derallieur noises
I have just put a new chain on my bike and the derallieur is making funny noises, like a whirring in all the gears, some stronger than another but all of then neverless, does anyone know what might be ...
1
vote
2answers
147 views
Free Spirit "Brittany Te12" Part Identification/Upgrade
i found this old 12 speed basically attached to a neighbor's back porch by vines, and aside from some superficial rust on the chrome, it seems to be structurally intact. the decals read as stated in ...
4
votes
2answers
325 views
Chainguard vs front mudguard to protect the chain from spray
My local bicycle mechanic advised me to get mudguards (such as the ones in Image 1) to extend the life of my drivetrain and protect it from spray in the winter. If I have £20 to spend on either a ...
1
vote
2answers
169 views
Does it matter how far backwards you can spin your drivetrain?
If I spun my cranks backwards on all my previous bikes I would get a good few spins out of them, maybe as many as three or four on one of the bikes. But with my current road bike I can barely get a ...
1
vote
0answers
93 views
Bike with a SRAM XD(R) freehub body and trainer with a Shimano freehub body?
I would like to change the wheelset of my bike, but I also have a smart trainer (Kickr core).
The wheelset I've retained so far are the Mavic Allroad, that are available with a Shimano or XDR freehub ...
1
vote
2answers
1k views
Drivetrain 2x conversion to 1x
I wish to know more about converting a 2x to a 1x, especially the Force AXS eTap group set.
I currently have a double chainring, but want to ditch the Front Derailleur and go to a single chainring. I ...
4
votes
2answers
241 views
Dangerous feature on a new 20" wheel kids bike? EZBuild pedals
TLDR: Rather than threading a pedal directly into the crank arm this bike maker has an EZBuild feature. The pedal is threaded into a cast aluminum part at the factory that rotates around the crank ...
0
votes
2answers
190 views
Is the Shimano SL-M590 shifter compatible with XTR RD-M900 rear derailleur?
Shimano is known for making their high end components incompatible with their lower ranges (e.g. dura-ace 7400). How do they handle this on their mountain bike range? In my case, I'd like to run a RD-...
1
vote
1answer
2k views
Is the Shimano TX-505-8 rear hub compatible with 11-speed cassettes?
After recently changing my bike's entire transmission, I noticed that when on the smallest sprocket, the chain is rubbing against the rear derailleur (right next to where the derailleur is attached to ...
17
votes
9answers
3k views
What would happen if I don’t replace worn drivetrain components?
What would happen if I took a entirely new drivetrain and just never replaced anything? Of course, I’d keep it clean and lubricated.
With 11 and 12 speed chains being as expensive as they are, the old ...
32
votes
2answers
16k views
Why does pedalling backwards not move my bike backwards?
On the Mountain bike I have, pedalling backwards moves the chain but doesn't drive the wheels of the bike backwards like you would expect it to. Why is this?
4
votes
3answers
6k views
What's a good, reliable mountain bike drivetrain (1x10?)
I'm thinking about switching my Salsa El Mariachi 29er mountain bike from singlespeed to gears. I love the reliability and simplicity of the singlespeed, but I've been doing more rides that involve ...