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Search: Posts Made By: mpetry912
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-09-24, 07:19 PM
Replies: 3
Views: 76
Posted By mpetry912

if this first version is supported by the Shimano...

if this first version is supported by the Shimano software, I'd suggest trying to do a software update

/markp
Forum: Classic & Vintage
05-08-24, 07:05 PM
Replies: 19
Views: 416
Posted By mpetry912

yes #619 does fit down into the upper derailleur...

yes #619 does fit down into the upper derailleur body

/markp
Forum: Bicycle Mechanics
05-08-24, 01:02 PM
Replies: 45
Views: 1,146
Posted By mpetry912

I like this chain indicator. it's longer than...

I like this chain indicator. it's longer than the other tools and therefore the span of measured chain is longer, so more accurate, which is why the little short tools don't work. Can't measure...
Forum: General Cycling Discussion
05-08-24, 12:37 PM
Replies: 19
Views: 428
Posted By mpetry912

the tool is helpful but for most derailleur...

the tool is helpful but for most derailleur hanger alignment problems I have found you can eyeball it. you want to be sure that the derailleur pulleys are in the same plane as the cogs.

you can...
Forum: Electric Bikes
05-08-24, 12:12 PM
Replies: 7
Views: 344
Posted By mpetry912

all good points stated above. Choose a bike that...

all good points stated above. Choose a bike that uses a well known brand of motor / controller. The el cheapo units costing sub 1000 bucks from AMZN will only disappoint you and they are not...
Forum: Electric Bikes
05-08-24, 11:47 AM
Replies: 8
Views: 180
Posted By mpetry912

gut feel this is an iffy thing. notwithstanding...

gut feel this is an iffy thing. notwithstanding the fact that you have to carry a big heavy charger with you, I would worry that the hotel would not allow you to bring the bikes into the room.
...
Forum: Classic & Vintage
05-06-24, 02:53 PM
Replies: 27
Views: 721
Posted By mpetry912

putting "Left crank arm" into ebay I get many...

putting "Left crank arm" into ebay I get many options for under 20 bucks.

but what do I know ?

/markp
Forum: Classic & Vintage
05-06-24, 02:40 PM
Replies: 27
Views: 721
Posted By mpetry912

with a crack like that the arm will never stay...

with a crack like that the arm will never stay tight. You can find a replacement on ebay or other source.

/markp
Forum: Classic & Vintage
05-06-24, 01:38 PM
Replies: 14
Views: 528
Posted By mpetry912

I was going to say Whitcomb based on that wrap...

I was going to say Whitcomb based on that wrap over seat stay but the Mercian is a very good guess.

/markp
Forum: Classic & Vintage
05-06-24, 01:36 PM
Replies: 20
Views: 449
Posted By mpetry912

it has many interesting uses but one should...

it has many interesting uses but one should always check the results.

I recently did a project where I translated about 30 JSON files into Spanish.

Normally this would be a job for an intern...
Forum: Classic & Vintage
05-06-24, 11:11 AM
Replies: 20
Views: 449
Posted By mpetry912

yes, of course. I purposely left the details...

yes, of course.

I purposely left the details somewhat ambiguous to see how the model would handle the query.

/markp
Forum: Classic & Vintage
05-06-24, 11:04 AM
Replies: 20
Views: 449
Posted By mpetry912

It did not get the answer right ! I attribute...

It did not get the answer right ! I attribute that to the hub dimensions (flange diameter and spacing).

I purposely kept those details ambiguous. But yes, pretty impressive response.

/markp
Forum: Classic & Vintage
05-06-24, 10:52 AM
Replies: 20
Views: 449
Posted By mpetry912

Can AI Calculate spoke length ?

I spoke with a good friend on the phone this morning and one of the things we talked about was "could AI calculate spoke lengths". Interesting question.

So my prompt to ChatGPT (I have a premium...
Forum: Classic & Vintage
05-06-24, 10:38 AM
Replies: 46
Views: 1,139
Posted By mpetry912

Oh Matt that totally sucks ! hope the trip...

Oh Matt that totally sucks !

hope the trip home was not too difficult

/markp
Forum: Classic & Vintage
05-05-24, 10:25 PM
Replies: 6
Views: 243
Posted By mpetry912

BertoBerg looks like there are SOME parts in...

BertoBerg looks like there are SOME parts in there but you should assume that the hardware kit is not complete

Easy to find on ebay

/markp
Forum: Classic & Vintage
05-05-24, 10:07 PM
Replies: 6
Views: 243
Posted By mpetry912

these are later model post 1978 Catalog Ref...

these are later model post 1978

Catalog Ref #601 and 602

they do not look new despite the bag and I do not see the necessary spacers and bushings

/markp
Forum: Classic & Vintage
05-05-24, 09:02 PM
Replies: 5
Views: 262
Posted By mpetry912

looking forward to a ride report on this one. ...

looking forward to a ride report on this one. Quinns were supposed to have pretty radical handling and geometry.

/markp
Forum: Classic & Vintage
05-05-24, 08:32 PM
Replies: 8
Views: 239
Posted By mpetry912

on the rear assuming 126 OLD and 40 spokes 3...

on the rear assuming 126 OLD and 40 spokes 3 cross to 612 ERD I'm getting

293.6 for the NDS (round up to 294)
291.8 for the DS (round up to 292)

for the front 295.4 or round up to 296
...
Forum: Classic & Vintage
05-05-24, 07:41 PM
Replies: 8
Views: 239
Posted By mpetry912

what rims are you using ? I can run that thru...

what rims are you using ? I can run that thru my tool here.

/markp
Forum: Classic & Vintage
05-05-24, 07:22 PM
Replies: 8
Views: 239
Posted By mpetry912

it would be helpful to know what rims you are...

it would be helpful to know what rims you are using and what cross - 3x (recommended) or 4x ??

help us help you

/markp
Forum: Classic & Vintage
05-05-24, 07:15 PM
Replies: 8
Views: 239
Posted By mpetry912

for the early 3 piece Phil hubs I have used these...

for the early 3 piece Phil hubs I have used these dimensions with good result

special note: Some Phil rear hubs were spaced to customer request. Measure twice, cut once, as Phil himself told me in...
Forum: Bicycle Mechanics
05-05-24, 02:23 PM
Replies: 57
Views: 1,265
Posted By mpetry912

Like wear bars on a tire ! so I guess that rim...

Like wear bars on a tire ! so I guess that rim has lots of miles left in it

/markp
Forum: Bicycle Mechanics
05-05-24, 08:58 AM
Replies: 57
Views: 1,265
Posted By mpetry912

that sidewall looks pretty badly scored. ...

that sidewall looks pretty badly scored.

here in the Pac NW we have seen the black crud from winter riding become an abrasive and wear thru rim sidewalls over several seasons.

I know of at...
Forum: Classic & Vintage
05-05-24, 08:54 AM
Replies: 19
Views: 416
Posted By mpetry912

depending on the frame's braze ons you may need...

depending on the frame's braze ons you may need the special stepped end piece.

hard to find. I have a few.

/markp
Forum: General Cycling Discussion
05-05-24, 08:44 AM
Replies: 11
Views: 400
Posted By mpetry912

ridewithGPS is so much better than Strava it's...

ridewithGPS is so much better than Strava it's not even funny

/markp
Forum: Classic & Vintage
05-04-24, 02:58 PM
Replies: 45
Views: 1,409
Posted By mpetry912

unworthy1 I have never seen a headset top nut...

unworthy1 I have never seen a headset top nut like that ! pretty cool

/markp
Forum: Bicycle Mechanics
05-04-24, 02:54 PM
Replies: 5
Views: 158
Posted By mpetry912

they are probably just manufacturing lot numbers....

they are probably just manufacturing lot numbers.

not a detail worth worrying about.

there MAY be "left" and "right" pads on your brake, but at least the 8000 series pads that I have will...
Forum: Bicycle Mechanics
05-04-24, 11:19 AM
Replies: 45
Views: 1,146
Posted By mpetry912

Sorry to disappoint you but you've answered your...

Sorry to disappoint you but you've answered your own question. The steel rule method is good.

/markp
Forum: Bicycle Mechanics
05-04-24, 11:16 AM
Replies: 42
Views: 995
Posted By mpetry912

depends on where you live. I use just a quick...

depends on where you live. I use just a quick spritz of automotive degreaser, and then soapy water (dawn ultra) with a splash of kerosene, scrub with a toothbrush, spray rinse with hose, blow off...
Forum: Classic & Vintage
04-30-24, 05:24 PM
Replies: 44
Views: 1,163
Posted By mpetry912

if you still have the bike apart and have 2 spare...

if you still have the bike apart and have 2 spare balls, running loose balls in the lower cup is a good thing.

just turn it upside down to assemble, and use a sticky grease.

/markp
Forum: Classic & Vintage
04-30-24, 04:24 PM
Replies: 131
Views: 10,809
Posted By mpetry912

the Dinucci /markp ...

the Dinucci

/markp

https://cimg7.ibsrv.net/gimg/bikeforums.net-vbulletin/1934x1283/atbeach_apr24_d1d78584539c63f69055cc34f24ef4b38180f9e4.jpg
Forum: Classic & Vintage
04-30-24, 09:41 AM
Replies: 26
Views: 739
Posted By mpetry912

repechage will know if anyone does /markp

repechage will know if anyone does

/markp
Forum: Classic & Vintage
04-28-24, 01:17 PM
Replies: 74
Views: 2,153
Posted By mpetry912

the teeter totter argument is not right. ...

the teeter totter argument is not right.

Imagine two kids, 50 lb each, on the seats, one one each side of the teeter totter. up, down, up down.

now one kid dismounts and sits on on the...
Forum: Classic & Vintage
04-28-24, 12:53 PM
Replies: 44
Views: 1,163
Posted By mpetry912

don't trim the fork. Add a thin headset spacer. ...

don't trim the fork. Add a thin headset spacer.

/markp
Forum: Classic & Vintage
04-28-24, 07:57 AM
Replies: 74
Views: 2,153
Posted By mpetry912

torque is expressed as length of the lever arm...

torque is expressed as length of the lever arm and the force applied. Foot-pounds, newton-meters etc.

the accurate application of a torque value is achieved by having your hand on the handle, as...
Forum: Classic & Vintage
04-26-24, 01:06 PM
Replies: 14
Views: 549
Posted By mpetry912

that's a real neat part, I especially like the...

that's a real neat part, I especially like the colleted upper nut that compresses as you tighten it.

that said, I would not install that on a bike I was going to ride. No spare parts available and...
Forum: Classic & Vintage
04-26-24, 12:08 PM
Replies: 74
Views: 2,153
Posted By mpetry912

I would suggest to you that 300 inch / lb is too...

I would suggest to you that 300 inch / lb is too much torque for Campy cranks. I believe you are at risk of splitting the arms at that torque level.

Campy arms are quite soft and just blindly...
Forum: Classic & Vintage
04-26-24, 11:46 AM
Replies: 9
Views: 411
Posted By mpetry912

who makes this one ? haha /markp ...

who makes this one ? haha

/markp
https://cimg8.ibsrv.net/gimg/bikeforums.net-vbulletin/646x764/silca_cage_rainbow_b4399408d9e2683a28f8135adbd8b81749a9ecde.jpg
Forum: General Cycling Discussion
04-24-24, 03:34 PM
Replies: 27
Views: 1,181
Posted By mpetry912

Agreed. Same discussion with riders who insist...

Agreed. Same discussion with riders who insist that their wheels are tensioned to 140KgF. Why ? Because they saw it in a GCN video on YouTube.

If you want to run equipment that is super...
Forum: General Cycling Discussion
04-24-24, 03:30 PM
Replies: 6
Views: 323
Posted By mpetry912

I think maybe you bought a size too small ? or...

I think maybe you bought a size too small ? or the heel tab is just too tall ?

that said, the Shimano shoes have gotten narrower over the last few years. The latest pair I bought was just too...
Forum: Bicycle Mechanics
04-24-24, 01:03 PM
Replies: 23
Views: 545
Posted By mpetry912

Mine /markp ...

Mine

/markp

https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulletin/747x516/912toolkit1_d409d3b1196dc33f8cb12875970ede3e5f52b098.jpg
Forum: Bicycle Mechanics
04-24-24, 08:59 AM
Replies: 38
Views: 1,074
Posted By mpetry912

I looked at the pics and I see several things but...

I looked at the pics and I see several things but this is the big problem. Either the brake posts are assymetric (unlikely) or you have something else set up wrong on the brakes. I disagree with your...
Forum: General Cycling Discussion
04-22-24, 08:31 AM
Replies: 29
Views: 1,057
Posted By mpetry912

that's the one with the single leg fork ! never...

that's the one with the single leg fork ! never looked right to me.

too much bending moment on the front axle.

/markp
Forum: Classic & Vintage
04-21-24, 06:51 PM
Replies: 29
Views: 1,278
Posted By mpetry912

maybe a 35 Rear and 32 front? larger frames...

maybe a 35 Rear and 32 front?

larger frames tend to have more of the weight distribution on the rear wheel.

yes, very nice bike

/markp
Forum: Bicycle Mechanics
04-21-24, 02:03 PM
Replies: 40
Views: 1,556
Posted By mpetry912

suggest you use LESS pressure - just a few PSI -...

suggest you use LESS pressure - just a few PSI - when installing.

these tubes are quite stretchy

/markp
Forum: Bicycle Mechanics
04-21-24, 01:44 PM
Replies: 17
Views: 538
Posted By mpetry912

here's what I'd do. draw a line with a sharpie to...

here's what I'd do. draw a line with a sharpie to indicate the post's height that you want

take it out

below the line, use your automatic center punch (or heck even a regular punch with a...
Forum: Bicycle Mechanics
04-21-24, 10:37 AM
Replies: 30
Views: 1,455
Posted By mpetry912

hey sweeks, thanks buddy, some real information...

hey sweeks, thanks buddy, some real information as opposed to speculation, appreciate it !

Mtracer am I to understand that that the link that failed was immediately adjacent to the removeable...
Forum: Classic & Vintage
04-20-24, 05:01 PM
Replies: 14
Views: 456
Posted By mpetry912

get a longer bolt and use that to squeeze the...

get a longer bolt and use that to squeeze the ears of the bracket together

then re-install the original if you can make it fit

I do not care for this type of clamp.

you might line the inside...
Forum: Classic & Vintage
04-20-24, 04:50 PM
Replies: 24
Views: 802
Posted By mpetry912

way better than when it left St. Etienne ...

way better than when it left St. Etienne

/markp
Forum: Bicycle Mechanics
04-20-24, 04:49 PM
Replies: 20
Views: 497
Posted By mpetry912

just run the chain across your fingers, you may...

just run the chain across your fingers, you may feel a popped link

almost now way to fix it. are 10 speed cassettes and chains still available at reasonable prices ?

probably need to replace...
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