Gears in the drivetrain of a bike.

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4answers
119 views

Derailleur/Gears Locks Up/ Freezes Up/Stalls

Hey guys I have a specialized mtb with the old oval chainrings and lately it's been locking up. When I start pedalling "hard" or faster the crank stops turning and then jumps forward a bit and ...
0
votes
1answer
66 views

What other parts might need replacing if I replace an old freewheel gear set for a modern freehub cassette?

I currently have a pre 1970s 10 speed Claud Butler. Perhaps back then men were real men but there is no climbing gear. Since I mostly do touring this is a bit of a problem. Finding a new freewheel ...
0
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2answers
166 views

Chain is choking and pedals fly forwards when going up hill or standing on the bike pedals

I have a 2 month old Vodoo Bizango from Halfords in the UK. I have had this problem about 2 weeks into having the bike where if I'm on the highest gear and want to do sprints (standing on the pedals) ...
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1answer
160 views

My Gears Are not Shifting Well

my gears are not shifting well. i can only shift from 1st to 2nd...i don't know what is the problem i have shimano revoshift gear enter image description here here are some images
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2answers
838 views

8 speed shifter with 7 speed cassette

I just got a bike with broken hanger and derailleur. As the owner didn't want to put money in good parts, I installed a cheap Sunrun derailleur compatible with index, and a new hanger. Just after I ...
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1answer
772 views

Slow switching up higher gears

I have a fairly new MTB and I'm currently trying to tune the gears. Currently I can change down gears pretty smoothly I.e. 6 > 5 > 4 etc but going up the gears is slow for the chain to switch cogs. ...
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1answer
31 views

24 gear SRAM shifters- PROBLEM

So recently i bought a carrera vengeance for £45 which is a bargain and the only problem was the gears(24 gear SRAM shifters) for the left side. When i got it i tried to shift but it just clicks and ...
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1answer
61 views

Combine Nexus 3 Hub with Torpedo 3 gear shifter?

I have upgraded my bike with a Nexus 3 hub, but the corresponding gear shifter takes away too much handle space on my crooked handle bar (I have to grab the gear shifter during my rides). Hence, I'd ...
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1answer
111 views

Scott S30 road bike 11speed with 10 speed compatibility

I have a Scott S30 bike currently running a shimano 105 2x10 speed 50-34 crankset, shimano 105 10 speed front shifter and 10 speed cassete and chain. I have a new crank that i want to install, the ...
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1answer
97 views

Best Gear Shifters [closed]

I am new to Bicycling. I have a question on gear shifters. Mostly the bikes are available with Revo Shifter and EF Fire Shifters. Which one of these are best and why it is?
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0answers
156 views

Shimano Nexus 3 stuck on lowest gear

I have a bike with Shimano Nexus 3 gear, and it's stuck on lowest gear. However, if I move shift pin that changes gears it changes the gears. So Nexus itself seems to be working, but the pin is not ...
0
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1answer
67 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 ...
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0answers
94 views

How can I prevent “chain suck”? [duplicate]

I know what the above is: when your chain bunches when you change gears & the bunch runs through the front derailleur and wrenches it. This damage is pretty much irreparable, and has cost me far ...
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votes
1answer
2k views

Specific 10 speed chain models that work well on 9 speed Shimano rear drivetrains

I maintain several 9-speed (rear cassette) road bikes (Giant OCR 1/2/3, Tiagra and 105 from 2000-ish era) and one 10-speed rear cassette 105 road bike, made in 2007. I'm trying to find out if I can ...
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votes
3answers
88 views

Sensible shifting on a triple chainring?

I have found from experience on my 3x7 MTB that shifting a triple front chainring is useful if you do the following: I tend to use only the first 3 cogs in the smallest chainring so that is 3 very ...
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votes
2answers
265 views

What to upgrade to achieve a higher top speed?

I enjoy going fast and my current bicycle tops too early, what kind of upgrades would I need to make to achieve a taller final gear?
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votes
2answers
70 views

Using only 7 speeds of an 8 speed freewheel is ok?

I currently have a 7 speed Shimano RD (rear derailleur) that is working perfectly with the stock 7 speed freewheel which is 14-28. Shimano has a MegaRange 7 speed freewheel that is 14-34 but the ...
-2
votes
1answer
55 views

Quad chainring (4x12)?

Does anyone yet make an affordable quad chainring? I would love to see a 4x12 with my staggered cog idea such that all 12 gears are shifted progressively using the 4 chainrings. Each chainring would ...
-2
votes
0answers
87 views

Left side isolated granny gear, right side all other gears? Possible and practical?

To me, the left side on a bike that doesn't have a rear disc brake is being somewhat wasted. So how about this idea... on the right side have the normal gears but on the left side, have a ...
-3
votes
0answers
104 views

Closely spaced nonoverlapping 36 (2x12x2) gears borrowing from music theory. Good idea?

I had an idea. Why not space gears on a bike the same as musical notes? For example, in music, if you start on a certain note (let's say C3), you need to go up 12 more half steps (notes) to get to ...
-4
votes
1answer
90 views

Super close ratio high gears via double size sprockets… practical?

I am wondering why they use such small cogs on a bike. Problem with that is as you get down below about 15 teeth, you cannot get precise steps to the next gear. For example, you can go 15 to 14 or ...
-5
votes
1answer
43 views

How does a RD (rear derailleur) handle variable tooth gaps?

I am trying to better understand how a rear derailleur (RD) works. I can understand how the RD moves inward and outward but suppose someone changes several of their cogs on the cassette. Let's just ...
-5
votes
1answer
62 views

Why don't we see this special progressive 3x5 gear setup being offered? [duplicate]

This question is not the same as the 36 gear post which used a combination of internal hub gears, cogs, and chainrings. This one is much simpler and much lower cost. Part of the problem of something ...
-6
votes
2answers
76 views

2 speed quad sprocket bike… do these exist? If not, why not? [on hold]

I was wondering if they make a 2 speed bike with a design having 2 front sprockets (one on each side of the bottom bracket) and 2 rear sprockets such that there is some mechanism that can switch ...