Citius
Guest
You know those horizontal dropouts are used with QRs, don't you?
What Are These Adjustment Screws On Wheel Mountings (Hangers??) For?
- Thread starter woodbine
- Start date
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You know those horizontal dropouts are used with QRs, don't you?
snailracer
Über Member
Sure, but I would only be confident if the QR was of good quality and in good condition, and you were strong enough to really tighten it down. The axle nut is the more foolproof solution.
snailracer
Über Member
Sheldon Brown:
"If you are going to use a quick release with a fixed gear, you should make sure to use a good quality enclosed-cam skewer."
Citius
Guest
The point is (which I'm making again) - those are not fixed/ss dropouts.
Andy_R
Hard of hearing..I said Herd of Herring..oh FFS..
- Location
- County Durham
youngoldbloke
The older I get, the faster I used to be ...
Rear facing 'fork ends' (the correct term) are used on track frames and dedicated single speed fixed/frames.
Adjustment screws on dropout ends allow you to set up the position of the rear wheel so that it can be easily replaced in the correct position in the dropouts. They perform NO function on a frame with dropouts used as fixed or single speed, other than allowing you to replace the rear wheel accurately in the dropouts. They were a desirable feature on bikes until vertical dropouts were introduced. My first 'proper' bike in the early sixties had 'Campag Ends' so equipped.
Adjustment screws on dropout ends allow you to set up the position of the rear wheel so that it can be easily replaced in the correct position in the dropouts. They perform NO function on a frame with dropouts used as fixed or single speed, other than allowing you to replace the rear wheel accurately in the dropouts. They were a desirable feature on bikes until vertical dropouts were introduced. My first 'proper' bike in the early sixties had 'Campag Ends' so equipped.
snailracer
Über Member
OK, what stops them from being used as such? As they have been since (at least) the 1970's?
Dogtrousers
Kilometre nibbler
Sheldon's point about using good quality skewers at the back with horizontal dropouts applies just as much to geared bikes as it does to fixed/SS. You have to be careful to get a decent tension in when closing the QR or you can end up pulling your back wheel out of line while riding. Or at least, that's my experience.
Not that this has anything to do with the OP's question, really. The adjusters just make getting the wheel alignment done a bit easier. I've never had a frame with them I've always thought they were just are a sign of a posh frame.
Not that this has anything to do with the OP's question, really. The adjusters just make getting the wheel alignment done a bit easier. I've never had a frame with them I've always thought they were just are a sign of a posh frame.
Citius
Guest
They can be used with fixed/ss (as can vertical dropouts too, with a tensioner) - but your assertion that they are designed or intended for fixed/ss use is wrong.
Just take the correction and move on.
snailracer
Über Member
Frame makers have no problem accurately placing dropouts. However, the ability to position the axle in different positions along the slot enables chain tension to be accurately maintained as the chain and chainset wears. This function is performed by an eccentric bottom bracket on a SS/fixed/hub geared bike with vertical dropouts.
Well this is making me nostalgic.
Did your bike have the ability to run either fixed/SS or derailleur?
ayceejay
Guru
- Location
- Rural Quebec
For 'chain tensioners', like the ones shown to work the wheel axle must go through the hole and the part with the writing on attached to the frame as the screws are turned the wheel is pulled back and the chain tightened and the tension released when the wheel is removed, they serve a different purpose from what the OP shows and only work with track ends.
Pale Rider
Legendary Member
Some hub gear bikes have horizontal drop outs because, absent an eccentric bottom bracket, there is no other way to tension the chain.
Most hub gears have a solid 15mm axle, which if the nuts are kept tight is usually sufficient to keep the wheel in place.
However, the pressure of pedalling can still pull the drive side of the axle forwards.
Bracing the axle from the rear of the drop out is a popular solution.
I wonder if the pic in the OP is of an incomplete version of one of these:
http://en.hollandbikeshop.com/brand...ioner/batavus-chain-tensioner-45mm-bolt-30mm/
Most hub gears have a solid 15mm axle, which if the nuts are kept tight is usually sufficient to keep the wheel in place.
However, the pressure of pedalling can still pull the drive side of the axle forwards.
Bracing the axle from the rear of the drop out is a popular solution.
I wonder if the pic in the OP is of an incomplete version of one of these:
http://en.hollandbikeshop.com/brand...ioner/batavus-chain-tensioner-45mm-bolt-30mm/
snailracer
Über Member
I don't think so. Such frames have been designed so that you can use them either fixed/SS or derailleur. One modern example from the Surly website:
"Rear Dropouts
Semi-horizontal dropouts give you singlespeed compatibility and wheelbase adjustability. Adjuster screws are included to keep your wheel in the right place for optimal shifting if you go with derailleurs."
http://surlybikes.com/bikes/cross_check/frame_highlights
Citius
Guest
Chain tension on a derailleur-geared bike is taken care of by the spring on the jockey wheel cage. - it is not something you would need to adjust at the dropouts. Such an adjustment would have no effect anyway.
The frame I am referring to was built specifically for road/racing. By someone that knew what they were doing.
