New answers tagged gears
6
Maybe not relevant or too late for you but this may help someone else....
I had the same issue with chain slipping on smallest two cogs of the Eagle cassette when applying pressure .
Tried mostly everything everyone has suggested on this forum to tune the gears....
And then I realised all it was is that I installed the sram powerlink on the chain the wrong ...
4
Others are mostly suggesting alternatives, but I think you deserve the answer to the option you asked about.
Yes, there should not be any problem with doing that change. It should work perfectly fine, you will just need a longer chain. I have this Sora with 11-32 on my road bike and I do not think the steps are unbearably large. My main bike even uses the ...
0
50-39-30 chainrings with the existing GS variant mech
Total Capacity: 37 teeth or less
Largest sprocket 27T
Smallest sprocket 11T
Chainwheel tooth difference: 22 teeth or less.
Big/Big of 50:27 and little/little gear of 30:11 is a total chain difference of (50+27)-(30+11) or 36 teeth.
Nominally you're at Shimano's posted limit for that mech
However I ...
4
You have several options depending what is important to her, I am presuming cost is a factor.
11-34 cassette with new derailleur and chain (given cassettes and chains are consumable) is cost effective, but it does mean the jump between gear changes increases. If she does not need the higher gears then there are ways to bodge a cassette of say 14-34 that ...
1
According to Sheldon Brown the two cable 5 speed hubs were made in 1991-1992 in a freewheel and drum brake model called the 5 Star and the 5 Star Elite w/drum brake. He lists the features for these hubs as:
Two cables: unreliable, cantilevered pinion pins
Further
The weak point of the 2-cable 5-speed hubs was the shift control units. The S5 required a ...
2
It looks like these are mounted in the same way as downtube shifters. If that is so, many downtube shifter band clamps are available aftermarket for the frame, stem or handlebar. If you take the shifters off your clamp you should be able to compare photos of this type of solution
See examples:
https://www.bricklanebikes.co.uk/via-downtube-shifter-mount
https:...
6
There's more to front derailleur adjustment than limit screws and cable tension. Both the angle of the derailleur and the height need to be set properly.
The angle of the derailleur being off can cause chain rub against the cage. If the rear of the cage is angled too far outward, the chain can rub against the inside of the cage when the chain is on the ...
5
Are you trying to bring the derailleur farther outwards? If so, you need to add cable tension. Screwing out the H limit screw won’t help if there isn’t enough tension to get to the limit anyways.
To check for chainring problems, derail the chain from the chainrings entirely and give the cranks a spin. If you see the chainrings wiggle side to side, then you ...
30
I think it's simpler than what many think.
Car and motorcycle drivetrain is a reductor: their ratio (driver to wheel) < 1 in most cases. Bicycles are the opposite: the wheel normally turns faster than the cranks, and the drivetrain is a multiplier.
It is somehow easier to remember and 'feel' ratios that are greater than 1: compare 4.3, 3.7, 2.9 with 0.23, ...
7
The front-over-rear ratio for the drive train on a bicycle describes how much faster the rear wheel turns than the rider's cadence.
The rear-over-front ratio for the drive train on a motorcycle describes how much more torque the drive train can produce at the rear wheel than at the motor.
It is of course matter of convention which is used, but I would ...
6
Right now we have a single standard of frontteeth:rearteeth like 53:11 and 30:34, which has been around for many decades. But does not account for wheel diameter or crank length.
So we get another standard which is Gain Ratio
And we still have an old-school notation of Gear Inches from the high-roller bikes so there's some consistency over time.
...
1
On a car, first gear might be 5:1. Five (input) rotations of the crankshaft for one (output) rotation of the propshaft. This tells you nothing of the number of teeth that are actually used on the gears. One a bike, we express the gearing in terms of teeth front and rear, eg 39/13. Not the number of rotations. This is more useful for calculating gear-inches ...
9
When talking about bicycle gearing, the overall theme (in my mind) is translating rotations of the crank to distance traveled. Historically, I believe this was used to translate the gearing of "safety" bicycles (what we now ride) to the size of the larger wheels on the old penny-farthing highwheelers. In that case, you multiply the gear ratio by ...
1
No mechanical part is perfect in real life. There's a tolerance for everything, which means that your two identical model hubs may actually be slightly different dimensions. We are talking about a few tenths of a millimeter at most, but it only takes that much misalignment for your shifting to start feeling off.
Make sure your cassette is properly fastened.
...
2
The inside of the barrel adjuster should screw into- and out of the derailleur when you turn it. The part around it should only slide lengthwise but should turn with it (there is a slot which allows it to slide lengthwise but ensures they turn with each other).
In my experience the Ultegra R8000 barrel adjuster has an unusually fine thread and needs quite a ...
1
Regarding the barrel adjuster: it only has a few turns of adjustability before its parts unscrew from each other (the inner part is keyed to the derailleur body). You probably need to detach the cable, remove the barrel-adjuster parts, and put them back together. When you reassemble everything, you can't use the barrel adjuster to compensate for much ...
1
My experiences here differ from some others.
I have 2 sets of wheels from the same brand (hunt) 1 700c aero 25mm and 1 650b fat 38mm gravel. Both disc but the gravel wheels with a 11-34 and the aero wheels with a 11-30.
Moth mechs were med-cage (GS). Originally 1 was Tiagra now its 105 5800. The other 105 5800.
Absolutely no disk rub or shifting issues.
1
There isn't really a coherent RX600 groupset.
Basically GRX is a glossy re-marketing exercise for a bunch of different parts from different sources
The RX400 rd is a repurposed Deore T6000 and designed for 32-36t cassettes. It would shift both 10 and 11 speed road perfectly but it's not a good choice when you hope to fit narrower cassettes, it's much more ...
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