Hello and welcome to this video on How to replace a Chainring on a crankset.
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So when, and why would we want to change a Chainring on a crank set?
Well, the crank set is probably the most important part of the drive of your bike.
And these teeth take a lot of strain and power output from peddling down on your bike.
Over time these teeth wear down and only effect performance, but also become extremely dangerous.
When the teeth become worn like this. this is when the chain can become dislodged and jam, and in turn can sen you off flying over the handle bars.
Which, is not cool at all. So yes lets get a move on and start getting this Chainring replaced.
STEP 1
First we need to extract the crank from the square taper spindle to gain access to the inner Chainring
If you are unaware of how to do this then do not worry a video is a available on How to extract a crank from a square pin bottom bracket.
STEP 2
Great well we have our crank set off our bike.
All that we need to do now is get the replacement Chainring. what people generally do is go for a like for like.
that is the actual teeth on the Chainring itself we are going for the inner one.
it actually says on it thirty nine, which is thirty nine on there. As long as the diameter of the crank fits the bolts of the Chainring then you are good to go.
We have ours here, it is a Stronglite and it is a thirty nine. So what are we waiting for, lets get this crankset apart and get this Chainring Replaced.
STEP 3
You are going to need a couple of tools to taker your crank set apart. With this being an older crank set.
The bolts here at the front will require a 5mm Alan key, and on the back we need a Chainring peg spanner.
New Chainring's may require using a torque wrench to stick to the manufacturers recommendation
Now looking at the crank set the inner Chainring has a chamfered edge closest to the face.
If you are unsure of how the crank set is assembled I generally always say take a photograph so you know exactly how it should be before dismantling it.
Once dismantled give every thing a good clean before reassembling
STEP 4
Things to bear in mind when reassembling. First this tab on the outer Chainring sits wear the pedal arm is.
this Stops your chain from becoming lodged in the gap, so this needs to be in line with the pedal arm.
Ensure all parts are perfectly clean, this prevents creaking at a later date
Now apply a small amount of anti seize grease onto the Chainring bolts.
aline all the Chainring's back on the crank. Using the tools go around just finger tight to begin with then slowly go around tightening the bolts in turn.
tightening them up. Apply a little bit more pressure as you go around each turn.
STEP 5
Well we have our Chainring all ready to go al that is left to do now is get this crank set back on the bike and we are ready to go.
Brilliant, well that is one job done it really did need doing. These are like razors and very dangerous indeed.
I can not wait to get this bike out and try this Chainring out
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it all really does help. Why not visit our website at www.bikeituk.club on there you will find lots of maintenance hints and tips lots of Retro vintage Road Bikes.
and plenty of restorations just like this one we do have loads coming up. so hang around most of all thanks for watching!
Bye for now!