Adjusting brakes

On 21/07/2020 13.13, Stephen Bauman wrote:
On Monday, July 20, 2020 at 10:04:37 PM UTC-4, AK wrote:

Bike is at the shop for spoke replacement and truing.

I saw some material on truing, but it was confusing at best.

Andy

Truing requires experience and practice. Find a broken wheel
somewhere and practice on it before attempting to fix your own bike.
It also requires special tools (truing stand, dishing gauge, etc.).
There are ways to true wheels without them.

This is simply not true. A work colleague bent a wheel and with a bit
of patience some toothpicks and sellotape, he got in back to under a mm.
I know, because I put it on the stand to 'finish the job'. Didn't
take much finishing :-o

If your bike shop did not tell you, bring the bike back after about
100 miles to check the wheel. Repeat until a touch up is no longer
required.

If they need to adjust it, never, ever, take it back.

On 21/07/2020 18.57, Sir Ridesalot wrote:
On Tuesday, 21 July 2020 12:54:06 UTC-4, sms wrote:
On 7/20/2020 10:40 PM, AK wrote:

snip

That is mostly true.

But as a retired scientist, I love to learn new things.

I will at some point learn how to true a wheel.

It takes a truing stand, patience, and the realization that you
will probably never achieve a perfectly true wheel. Tightening and
loosening spokes on alternate sides by only a small amount in each
iteration of truing. Remember that not only does the wheel need to
be true side to side, it also has to remain round. And you can
really screw things up if you over-tighten spokes.

Many people have trued many wheels without having to use a truing
stand. They do it with the wheel still on the bike. It's a good skill
to have if touring. Then you can true a wheel on tour or on a long
ride if needed.


Exactly. This isn't wheel building. For most low-mid range wheels a
bit out of true, a bit of care and attention will do the job just fine.

On 21/07/2020 23.44, John B. wrote:
On Tue, 21 Jul 2020 15:13:18 -0700 (PDT), AK
wrote:

On Monday, July 20, 2020 at 8:59:59 AM UTC-5, AK wrote:
On Sunday, July 19, 2020 at 6:37:22 PM UTC-5, AMuzi wrote:
On 7/19/2020 1:44 PM, AK wrote:
On Saturday, July 18, 2020 at 7:59:12 AM UTC-5, AMuzi wrote:
On 7/18/2020 2:39 AM, AK wrote:
I am having a very hard time adjusting my rear brakes.

I have a mountain bike. Low end. :-)

If I adjust it to where it grabs the rim tightly, it
slows my bike down due to the resistance from the brake
touching the rim.

It's very frustrating.

Thanks, Andy


First off, does your rim run straight without dents ? Any
bearing slop? Secondly are there kinks or other impedimanta
to your cable?

Do your brake pads meet the rim squarely and fully or are
they askew?

Is everything original? Mismatch of standard lever with
long pull linear brake would give that symptom.

-- Andrew Muzi www.yellowjersey.org/ Open every day since
1 April, 1971

Yes to all your questions.

https://imgur.com/a/e61C1L5

https://imgur.com/a/nXBEr1Q


I don't see anything unusual.

Are the cables and brake pivots free moving and lubricated, tat
is, does the brake snap open when you release the lever?

-- Andrew Muzi www.yellowjersey.org/ Open every day since 1
April, 1971

I just found a broken spoke on my rear wheel.

I think my bike is plain wore out.

I need a better bike, but everyone is out except those bikes
costing $800+.

Does anyone have any mountain bikes in stock?

Andy

I pick up my rim tomorrow which had one spoke replaced and it was
trued.

$11

And a Park Tool truing stand is only $299.95 :-) -- Cheers,

While I have a Park Tool, and it is nice, I also have a Centrimaster

https://www.centrimaster.de/en/produ...-truing-stand/

Which I scored for cheaper that the Park, there is also the

https://www.wiggle.co.uk/lifeline-pr...l-truing-stand

and even

https://www.highonbikes.com/products...tand-jig-t3175

If you are desperate.

On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:
On 21/07/2020 13.13, Stephen Bauman wrote:
On Monday, July 20, 2020 at 10:04:37 PM UTC-4, AK wrote:

Bike is at the shop for spoke replacement and truing.

I saw some material on truing, but it was confusing at best.

Andy

Truing requires experience and practice. Find a broken wheel
somewhere and practice on it before attempting to fix your own bike.
It also requires special tools (truing stand, dishing gauge, etc.).
There are ways to true wheels without them.

This is simply not true. A work colleague bent a wheel and with a bit
of patience some toothpicks and sellotape, he got in back to under a mm.
I know, because I put it on the stand to 'finish the job'. Didn't
take much finishing :-o

If your bike shop did not tell you, bring the bike back after about
100 miles to check the wheel. Repeat until a touch up is no longer
required.

If they need to adjust it, never, ever, take it back.

Some people have both manual dexterity and mechanical awareness. These are not universal skills. Because your friend has them doesn't mean that others do.

On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a wheel. So your advice is questionable to say the least. Riding a bike, especially those with carbon wheels, beds the spoke nipples, also spoke tension bends the rim differently on a stand than on the road under the jarring of the potholes and bad roads and almost always requires a minor straightening after a hundred miles or so

On 7/30/2020 10:02 AM, wrote:
On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a wheel. So your advice is questionable to say the least. Riding a bike, especially those with carbon wheels, beds the spoke nipples, also spoke tension bends the rim differently on a stand than on the road under the jarring of the potholes and bad roads and almost always requires a minor straightening after a hundred miles or so


That's ridiculous.
If we had to ship new wheels back here and then out again
we'd be out of business.

Mr Tosspot had it exactly right that rework means it wasn't
built well to start.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On Thursday, July 30, 2020 at 8:22:42 AM UTC-7, AMuzi wrote:
On 7/30/2020 10:02 AM, wrote:
On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a wheel. So your advice is questionable to say the least. Riding a bike, especially those with carbon wheels, beds the spoke nipples, also spoke tension bends the rim differently on a stand than on the road under the jarring of the potholes and bad roads and almost always requires a minor straightening after a hundred miles or so


That's ridiculous.
If we had to ship new wheels back here and then out again
we'd be out of business.

Mr Tosspot had it exactly right that rework means it wasn't
built well to start.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

All you're saying is that your customers are willing to accept a mm or two out of true or round.

On 7/30/2020 11:22 AM, AMuzi wrote:
On 7/30/2020 10:02 AM, wrote:
On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a
wheel. So your advice is questionable to say the least. Riding a bike,
especially those with carbon wheels, beds the spoke nipples, also
spoke tension bends the rim differently on a stand than on the road
under the jarring of the potholes and bad roads and almost always
requires a minor straightening after a hundred miles or so


That's ridiculous.
If we had to ship new wheels back here and then out again we'd be out of
business.

Mr Tosspot had it exactly right that rework means it wasn't built well
to start.

I can remember having to re-true wheels in my very early days of wheel
building. Then I discovered pre-stressing the spokes, or stress
relieving them, as Jobst called it. It made a huge difference.


--
- Frank Krygowski

On 7/30/2020 10:39 AM, wrote:
On Thursday, July 30, 2020 at 8:22:42 AM UTC-7, AMuzi wrote:
On 7/30/2020 10:02 AM, wrote:
On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a wheel. So your advice is questionable to say the least. Riding a bike, especially those with carbon wheels, beds the spoke nipples, also spoke tension bends the rim differently on a stand than on the road under the jarring of the potholes and bad roads and almost always requires a minor straightening after a hundred miles or so


That's ridiculous.
If we had to ship new wheels back here and then out again
we'd be out of business.

Mr Tosspot had it exactly right that rework means it wasn't
built well to start.



All you're saying is that your customers are willing to accept a mm or two out of true or round.


No, they would scream bloody murder[1].
And they would be right.

[1] American English translation = 'refund'

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On Thursday, July 30, 2020 at 10:37:46 AM UTC-7, AMuzi wrote:
On 7/30/2020 10:39 AM, wrote:
On Thursday, July 30, 2020 at 8:22:42 AM UTC-7, AMuzi wrote:
On 7/30/2020 10:02 AM, wrote:
On Thursday, July 30, 2020 at 6:53:26 AM UTC-7, Tosspot wrote:

If they need to adjust it, never, ever, take it back.

What you are saying is that you do not know anything about truing a wheel. So your advice is questionable to say the least. Riding a bike, especially those with carbon wheels, beds the spoke nipples, also spoke tension bends the rim differently on a stand than on the road under the jarring of the potholes and bad roads and almost always requires a minor straightening after a hundred miles or so


That's ridiculous.
If we had to ship new wheels back here and then out again
we'd be out of business.

Mr Tosspot had it exactly right that rework means it wasn't
built well to start.



All you're saying is that your customers are willing to accept a mm or two out of true or round.


No, they would scream bloody murder[1].
And they would be right.

[1] American English translation = 'refund'

I'm having a little problem with your claim. Since I had my Madone in the shop a couple of weeks ago the owner told me to bring it back in a couple of weeks so that they could check everything and TRUE THE WHEELS. Now Robby was one of the mechanics for 7/11 when Andy Hampsten won the Giro and in those days they would build all of their own wheels. So it isn't as if he isn't familiar with wheel building. Robby's shop is called "Wheelworks"