All Questions
19
questions
2
votes
0
answers
183
views
Bicycle chain roller diameter size chart?
I'm digging for a while now, and can not find any helpful chart for chain roller diameters e.g. Shimano 8,9,10,11,12 speed. It differs of course depending on the manufacturer and the purpose. We know ...
- 153
0
votes
1
answer
114
views
Gear combinations for 3×7 Raleigh CHESTER 21 2022, frame size 50 cm
Continuing Which gears combinations shouldn't be used? and How do I know what gear combinations should work without chain rasp on front derailleur?, which are rather generic questions and answers, ...
user69411
5
votes
2
answers
437
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 ...
- 53
1
vote
2
answers
140
views
Can no longer shift to lowest gear
I recently worked on my derailleur a bit to fix some issues in high gears, however, now I can no longer shift down to my lowest in the cassette when in either crankset.
I have tried the L screw at ...
3
votes
1
answer
769
views
Replaced rear axle, now seems to wobble
I was replacing a tyre a couple of days ago, and noticed my rear axle had snapped.
So I replaced the axle, just a normal road 10mm x 145mm, it's a basic Shimano sprocket set and no-name aluminium ...
- 133
2
votes
0
answers
164
views
Ever heard of a snapped rear gear sprocket? [closed]
Has anyone come across a rear gear sprocket snapping before? A clean break straight across the diameter. Happened at bottom of hill but not excessive force by any means.
Not new but not terribly old ...
- 21
4
votes
2
answers
311
views
Which rear cog should I remove if I want to add a 26 for climbing?
I have an old road bike with 53-39 rings and 13-23 cassette. Although it's generally flat in my area, I like to get to the top of these hills where they put the radio antennas (without dying). Max ...
- 51
0
votes
1
answer
462
views
Can you use shimano m8000 replacement cogs to replace Sunrace mx80 cogs?
Can one use m8000 replacement sprockets 11T 13T 15T to replace the corresponding mx80 sprockets?
I appreciate the clusters can't be switched due 3 free sprockets and 2 clusters of 4 on mx80 vs 5 free ...
user20209
4
votes
5
answers
7k
views
Difference between two drivetrains with the same gear ratio?
Given two identical, fixed-gear bicycles, one with a 36/12 gear combination and another with 48/16, will there be any noticeable difference when pedaling these two bicycles? I understand there may be ...
- 203
5
votes
3
answers
3k
views
Does effort require to pedal depend on the gear ratio or the gear inches?
I have a 20x1.75" 6-speed folding bike with 52x14-28t drivetrain. Even with the gearing at 52x14, ~3.71 ratio, I can still pedal uphill.
I also have a 700x25C fixed gear with 49x17t gearing or ~2.88 ...
- 837
1
vote
1
answer
1k
views
When I shift to the smallest cog, it's suddenly too loose
The other day I was riding with the chain on the smallest cog in the back (and the middle chainring in the front) and suddenly something felt like it slipped and the chain was suddenly way too loose. ...
- 197
1
vote
2
answers
482
views
chain jumping when puilling away in a higher gear
I replaced the rear cog as the chain I had snapped and I thought it had taken some teeth off. Now when I pull away in 1-3 gears it's ok, but if I am in gears 4-7 and I try to pull away ( say I have ...
- 11
0
votes
1
answer
103
views
The spring in my front dérailleur is jammed
My front derailleur is jammed by dirt (grease + fine dust), because of this the gear doesn't shift perfectly and chain is thrown off the cog. The spring is a bit unreachable because the derailleur arm ...
user14633
2
votes
1
answer
4k
views
Gears jumping/slipping from the rear cogset on a new bike
Its been 1 month since I have bought my new MTB (Kross globate 1.1) with 18 gears (shimano)..
Now the problem is chain has slipped twice while riding. First time my speed was around 25kph and second ...
- 133
3
votes
1
answer
4k
views
Can't change into the largest sprocket on rear derailleur
I bought my first road bike recently, and I've noticed I can't change into the largest cog/sprocket on the rear derailleur because when I pull the shifter the chain is pushed into the side of the ...
- 277