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Search: Posts Made By: GrayJay
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04-15-18, 09:25 PM
Replies: 13,642
Views: 2,768,536
Posted By GrayJay

The manitou I fork looks to be one of the early...

The manitou I fork looks to be one of the early (pre-answer production) that were manufactured by manitou around 1991. It would be good for a early 90's vintage restoration, same fork that Tomac...
Forum: Framebuilders
03-15-18, 02:23 AM
Replies: 5
Views: 996
Posted By GrayJay

Learn using the LFB and thicker tubes, save the...

Learn using the LFB and thicker tubes, save the expensive silver rod until you have built a few frames and need it for working on thin-wall tubing.

Refilling small acetylene bottles is fairly...
Forum: Framebuilders
12-12-17, 10:40 PM
Replies: 36
Views: 3,513
Posted By GrayJay

Change in fork length has the effect of changing...

Change in fork length has the effect of changing the head tube angle "HTA" (and also changes the STA and BB height). It takes a fork length change of around 20mm to produce 1 degree of change in the...
Forum: Framebuilders
12-12-17, 10:23 PM
Replies: 36
Views: 3,513
Posted By GrayJay

One of the best descriptions of trail behavior I...

One of the best descriptions of trail behavior I have seen that is well worth reading is at;
Spectrum Cycles | Geometry (http://www.spectrum-cycles.com/geometry.php)

I would image you could do a...
12-03-14, 12:57 AM
Replies: 137
Views: 17,901
Posted By GrayJay

You can get significantly more mechanical...

You can get significantly more mechanical advantage from those MAFACs if you set them up more like a medium profile design (or at least the neo-retro angle as described in the excellent analysis of...
11-27-14, 12:01 PM
Replies: 26
Views: 2,566
Posted By GrayJay

I had and raced on an older used pro-strada in...

I had and raced on an older used pro-strada in the early 1990's, had this identical (red) paint job, chrome and decals. What I mostly remember about it was that the points of the lugs were oddly...
10-26-14, 01:37 AM
Replies: 18
Views: 766
Posted By GrayJay

If the wheel has slipped in the dropouts...

If the wheel has slipped in the dropouts repeatedly, it has likely worn the forward end of the dropout. Once there is a slight taper worn into the dropout faces, it subsequently becomes much easier...
10-19-14, 11:22 AM
Replies: 32
Views: 1,728
Posted By GrayJay

No need to apply heat to re-bend the DO, heat...

No need to apply heat to re-bend the DO, heat will just mess-up the surrounding chrome. Clamping lower half-of the DO in a bench vice would likely work but may leave marks on the outside chrome face...
10-19-14, 10:38 AM
Replies: 57
Views: 5,570
Posted By GrayJay

Not exactly centerpull and no protruding post but...

Not exactly centerpull and no protruding post but in another instance of what it old is new again, the latest trend in breaking for high-end road bikes utilizes dual pivot calipers in which each of...
10-11-14, 10:14 PM
Replies: 34
Views: 2,679
Posted By GrayJay

At that age, OLD spacing would have originally...

At that age, OLD spacing would have originally been 126mm. 3X water bottle bosses sounds MUCH more like a touring frame. Put a rear wheel on it and compare the gap between tire and seattube with...
10-11-14, 09:49 PM
Replies: 48
Views: 6,406
Posted By GrayJay

Neat find, in the USA at least I dont remember...

Neat find, in the USA at least I dont remember ever seeing Giant branded bikes prior to around 1990 when they started marketing their own MTB and Cadex carbon frames. What does the headtube badge...
Forum: Framebuilders
07-24-14, 12:22 PM
Replies: 12
Views: 1,810
Posted By GrayJay

Good thread on kids bike construction, discussion...

Good thread on kids bike construction, discussion of tube sizes and sources;
kids bike 20" (http://forums.mtbr.com/frame-building/kids-bike-20-a-898962.html)
07-11-14, 11:05 AM
Replies: 82
Views: 8,563
Posted By GrayJay

Dont forget 507mm for 24" kid MTB's, 571mm for...

Dont forget 507mm for 24" kid MTB's, 571mm for 650c (26" narrow road tires) both are fairly common. There are also a couple of other 20" wheel sizes that all use different rims. I
nterestingly,...
07-11-14, 10:59 AM
Replies: 82
Views: 8,563
Posted By GrayJay

Fat bikes use standard 559mm (26" mtb tire size)...

Fat bikes use standard 559mm (26" mtb tire size) rims that are really wide (65-100mm width) combined with a huge tire to achieve tire outside diameter that is very close to a 29'er mtb tire. While...
07-08-14, 04:08 PM
Replies: 23
Views: 1,072
Posted By GrayJay

Easy solution, there are these offset brake pad...

Easy solution, there are these offset brake pad holders that add 7mm of reach;
BDop OFFSET HOLDERS (http://www.bdopcycling.com/BDop%20Offset%20Holders.asp)
07-07-14, 12:24 AM
Replies: 18
Views: 1,473
Posted By GrayJay

Rebuilding the wheel with quality new spokes...

Rebuilding the wheel with quality new spokes should be a good fix and work fine so long as the rim is not bent. No compelling reason to replace the hub if it is still in good shape but check first...
06-24-14, 11:05 AM
Replies: 17
Views: 2,078
Posted By GrayJay

Good mathematical analysis of cantilever geometry...

Good mathematical analysis of cantilever geometry at http://www.circleacycles.com/cantilevers/canti-geometry.pdf

Interesting to note that standard narrow angle cantis start with high MA but then...
06-19-14, 10:31 AM
Replies: 16
Views: 1,441
Posted By GrayJay

Looks very similar to the Banesto team bikes that...

Looks very similar to the Banesto team bikes that Indurain rode to TDF wins. Presence of interior helical splines in seattube would indicate if it was SLX or TSX, oria also used splines that run...
06-15-14, 10:02 PM
Replies: 31
Views: 9,147
Posted By GrayJay

If no spacer between the cartridges, I would...

If no spacer between the cartridges, I would adjust them just slightly looser that typical for a loose ball and cone bearing. You will kill the cartridges if there is side preload through the...
06-12-14, 01:05 AM
Replies: 13
Views: 1,206
Posted By GrayJay

If you find that 8s shifters and 7s FW dont play...

If you find that 8s shifters and 7s FW dont play nice together, try one of the alternate RD cable attachment locations in order slightly alter the pull ratio of the RD to increase travel of the RD...
06-07-14, 01:11 AM
Replies: 24
Views: 3,723
Posted By GrayJay

Between the mix of campy/sach/gipiemmi components...

Between the mix of campy/sach/gipiemmi components that are on there now, it is highly likely that someone changed out some of the parts at one time. THe sachs components were somewhat of a budget...
06-06-14, 08:50 PM
Replies: 11
Views: 1,538
Posted By GrayJay

It would probably work better if you disassemble...

It would probably work better if you disassemble the freewheel and use callipers to measure all the existing cogs and spacers, then use sandpaper to lap the spacers thinner where needed in order to...
05-29-14, 07:16 PM
Replies: 9
Views: 1,770
Posted By GrayJay

Ranf should be one of the nicer Oria tubesets, it...

Ranf should be one of the nicer Oria tubesets, it has vertical (not helical like columbus) reinforcing ridges inside the chain stays, down tube, steer tube and seat tube (in which the ridges run...
05-28-14, 11:15 PM
Replies: 9
Views: 1,770
Posted By GrayJay

I would estimate that this blue QA is from around...

I would estimate that this blue QA is from around 1990, give or take a couple of years. Looks like conventional size tubing and classic campy dropouts. Steel QA's from the early/mid 90s were built...
05-20-14, 10:43 AM
Replies: 14
Views: 2,082
Posted By GrayJay

I have a modolo 1" quill stem that dates from...

I have a modolo 1" quill stem that dates from early 90s that used a hinged bar clamp to allow for easy bar mounting. It is not completely removable faceplate design like the more modern & common...
05-16-14, 11:16 AM
Replies: 9
Views: 1,770
Posted By GrayJay

Post some good pictures for an ID of the bike,...

Post some good pictures for an ID of the bike, including any tubing decal. In the 2008 example post above, the decals looks consistent with the QA EL-OS road bike I bought new directly from William...
05-08-14, 12:15 AM
Replies: 13
Views: 840
Posted By GrayJay

You might try using cantilevers fitted with these...

You might try using cantilevers fitted with these offset brake pad holders;
BDop OFFSET HOLDERS (http://www.bdopcycling.com/BDop%20Offset%20Holders.asp)

These are road style pad holders so...
05-07-14, 11:47 PM
Replies: 11
Views: 2,936
Posted By GrayJay

If there is not an external friction shifting...

If there is not an external friction shifting setting, you might be able to just open them up and gut the index mechanism. I seem to remember that suntour index shifters used small ball-bearings and...
05-07-14, 11:43 PM
Replies: 8
Views: 761
Posted By GrayJay

There were long cage Chorus and CDA long cage...

There were long cage Chorus and CDA long cage rear derailleurs made prior to 1992 arrival of ergo shifting that were intended to work with synchroII shifters and had capacity for a 30T rear cog. I...
05-03-14, 12:13 AM
Replies: 50
Views: 6,259
Posted By GrayJay

all is forgiven if you apply reproduction AD...

all is forgiven if you apply reproduction AD decals over the fresh paint!
05-01-14, 10:39 AM
Replies: 15
Views: 1,524
Posted By GrayJay

I would guess that the bike dates from...

I would guess that the bike dates from 1930-1940's. Are the rims wooden or steel?
04-30-14, 03:05 AM
Replies: 19
Views: 1,231
Posted By GrayJay

Looks to me like the crank has self-extractor...

Looks to me like the crank has self-extractor bolts, a feature not found on Athena. More likely these are CDA or Chorus.
04-28-14, 11:15 PM
Replies: 19
Views: 1,231
Posted By GrayJay

I really like the look and font of the downtube...

I really like the look and font of the downtube decal. Paint on this bike is in fantastic shape for its age. Interesting that it still has toeclip pedals, non-aero brake cables and friction shifting....
04-28-14, 10:51 PM
Replies: 19
Views: 1,231
Posted By GrayJay

The RD is an early (84-85) C-record. VeloBase.com...

The RD is an early (84-85) C-record. VeloBase.com - Component: Campagnolo, C-Record First Gen. (http://velobase.com/ViewComponent.aspx?ID=353F4ECB-068F-4A05-A668-EF595DDB39D3&Enum=108&AbsPos=17) ...
04-27-14, 12:20 PM
Replies: 5
Views: 670
Posted By GrayJay

Replacing the cable guide is a very easy brazing...

Replacing the cable guide is a very easy brazing task, very do-able. The bike probably got used as an indoor windtrainer at some point with dripping sweat producing rust. Cable guide replacement...
04-25-14, 10:16 PM
Replies: 9
Views: 1,337
Posted By GrayJay

92mm is a lot of trail for a road bike, that...

92mm is a lot of trail for a road bike, that would require either an unusually slack HTA and/or a fork with very little rake. I really dont think such a bike would have any redeeming handling...
04-23-14, 01:04 PM
Replies: 8
Views: 581
Posted By GrayJay

Use the old cup from the cotter crank to verify...

Use the old cup from the cotter crank to verify that the new BB is same thread pitch. Might just need to have the shells threads chased out to clean them up, might just be full of 60 years worth or...
04-15-14, 03:08 PM
Replies: 16
Views: 923
Posted By GrayJay

Since you already have all the parts, it looks to...

Since you already have all the parts, it looks to me that it would be possible to modify the 9-speed cassette splines to fit onto the 8-speed hub body. OD of the spline pattern is same for both, the...
04-09-14, 11:29 AM
Replies: 9
Views: 6,004
Posted By GrayJay

8 speed ergo on a index compatible 7-speed FW...

8 speed ergo on a index compatible 7-speed FW works great, spacing is exactly same 5.0mm as campy 8 speed. You might try a 9-speed chain for even crisper shifting. Campy 8 speed shifters and RD would...
04-04-14, 12:51 PM
Replies: 46
Views: 4,270
Posted By GrayJay

duplicate post...

duplicate post...
04-04-14, 12:49 PM
Replies: 46
Views: 4,270
Posted By GrayJay

I have two girls and have found that once they...

I have two girls and have found that once they are riding 2-wheels and progress beyond basic needs of a 16" department store coaster brake junker, kids MTB are the way to go. Having gears gives them...
04-03-14, 03:47 PM
Replies: 20
Views: 1,933
Posted By GrayJay

I took the other compatibility approach and...

I took the other compatibility approach and drilled out the hole in my campy ergo shifter that the cable end sits down into so that a standard size cable end will fit. 20 years later, same ergo...
04-03-14, 03:40 PM
Replies: 35
Views: 4,973
Posted By GrayJay

Rims I used are 44mm wide snowcats Snowcat Rims...

Rims I used are 44mm wide snowcats Snowcat Rims (http://www.allweathersports.com/winter/snowcats.html)
They were originally deisigned to spread out the widest available 26" tires (about 2.5")...
04-03-14, 11:25 AM
Replies: 35
Views: 4,973
Posted By GrayJay

Here is a shot of my fattened-up Macalu; ...

Here is a shot of my fattened-up Macalu;

372627

Album of more detailed pictures of the build is at;
https://picasaweb.google.com/110245208849091527987/FatbikeBuild?authuser=0&feat=directlink ...
04-03-14, 01:31 AM
Replies: 35
Views: 4,973
Posted By GrayJay

I bought a very nice Macalu badged taiwanese TIG...

I bought a very nice Macalu badged taiwanese TIG steel MTB frame from Excel way back in 1994, they definitly had the Macalu label in use for longer than just 2-3 years.

I rode the same macalu...
03-29-14, 08:45 PM
Replies: 3
Views: 1,019
Posted By GrayJay

mavic did make there own proprietary cog/cassette...

mavic did make there own proprietary cog/cassette spline pattern for several years but they were fairly rare. THe mavic pattern is 9-spline (like shimano) but used very different looking rounded...
03-21-14, 12:12 PM
Replies: 3
Views: 844
Posted By GrayJay

First decide how many cogs you want (6,7,8,9?),...

First decide how many cogs you want (6,7,8,9?), any indexing considerations and if you want a threaded freewheel rear hub or a more reliable casette hub that is less prone to break axles. Mavic was...
03-21-14, 11:56 AM
Replies: 9
Views: 1,020
Posted By GrayJay

More modern cranks (such as your 7410) moved the...

More modern cranks (such as your 7410) moved the tapered portion of the crank further inboard relative to the arms and rings so that a shorter lighter, stiffer) spindle can be used without changing...
Forum: Framebuilders
03-19-14, 11:37 AM
Replies: 16
Views: 1,687
Posted By GrayJay

A jig is needed for initial fork construction but...

A jig is needed for initial fork construction but not so much for subsequent alignment of a steel fork. If this is for your own riding, give it a try yourself and don't ever re-sell to unsuspecting...
Forum: Framebuilders
02-26-14, 05:14 PM
Replies: 9
Views: 1,604
Posted By GrayJay

Acetylene creates a lot of soot while...

Acetylene creates a lot of soot while lighting/adjusting the torch, soot gets over everything.
Acetylene is also inherently unstable and mishandled tanks have been known to explode, definitely a...
Showing results 1 to 50 of 1000
 


 
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