Hercules Kestrel
#26
Not so New

Joined: Oct 2007
Posts: 485
Likes: 379
From: Libertyville, IL.
Bikes: I haven't counted lately
lauterwasser handlebars
My current thinking is towards a 3-speed rough-stuff bike, like an 80s MTB gravel conversion, but more elegant and with a 40-year-older frame. The dimensions of the thing, 21" seat tube with a 22-1/2" top, are pretty close to the 'one size up from your flat-bar MTB fit' heuristic that seems to work for converting pre-NORBA geometry frames.
650Bs, probably 48 mil Gravel King SS. (R/H Juniper Ridges would be dope, but 180 bucks for tires ain't happenin'.)
Flipped Alabatrosses or similar... more than an OG moustache, less than a modern dirt drop... a bit more dirt scorcher than dirt surfer, if you get the distinction. The gnomes from the Cave of Bad Ideas keep whispering "reverse brake levers" into my thalamus...
A ride to BART, ride to the dirt, ride the dirt, ride back to BART, ride BART, ride home sorta* bike.
--Shannon
* Anybody got linkage to builds like this? I utterly failed to come up with a useful name upon which to base a thread search. (I really don't want to dive into the definitional cesspit around terms like "path racer.")
650Bs, probably 48 mil Gravel King SS. (R/H Juniper Ridges would be dope, but 180 bucks for tires ain't happenin'.)
Flipped Alabatrosses or similar... more than an OG moustache, less than a modern dirt drop... a bit more dirt scorcher than dirt surfer, if you get the distinction. The gnomes from the Cave of Bad Ideas keep whispering "reverse brake levers" into my thalamus...
A ride to BART, ride to the dirt, ride the dirt, ride back to BART, ride BART, ride home sorta* bike.
--Shannon
* Anybody got linkage to builds like this? I utterly failed to come up with a useful name upon which to base a thread search. (I really don't want to dive into the definitional cesspit around terms like "path racer.")
#27
Senior Member



Joined: Mar 2007
Posts: 9,165
Likes: 5,350
From: SF Bay Area, East bay
Bikes: Miyata 618 GT, Marinoni, Kestral 200, Soma double cross 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball, Waterford rs11
#28
Sturmey Archer Hub


Joined: Aug 2005
Posts: 2,671
Likes: 1,941
From: New England
Bikes: Old Schwinns and old Raleighs
I am thinking this frame may be a bit later than 1949. It has a newer badge. The very nice catalogue photograph nlerner provided has the old style badge. I'd estimate this to be a 1950s bike. And yes, looks like a Kestrel frame with original paint and some graphics left. It is well-preserved. It was a sporty frame in its day with good tubing and lugs.
Wheels can be a tricky thing with these bikes. Unless you want to go all-original, I would avoid EA1 / 597mm rims because the tire selection now is poor. I would consider going one size up or one size down with rims. If you opt for 36-hole drilling, you have some additional options for wheels and hubs. But some people like to stick to 40 / 32 drilling because it was so much a part of the vintage, English system of building bikes.
A typical upgrade for a bike like this would be a medium-ratio AM or FM rear hub, for a sportier ride. A Hercules wide ratio three speed or a Sturmey AW would be more available in terms of hubs and parts on the market today. The Sturmey FW four speed gives you an extra low gear if you need more climbing power. The FW can also be converted to a 5-speed with a few changes.
It's a nice frame and a fine project.
Wheels can be a tricky thing with these bikes. Unless you want to go all-original, I would avoid EA1 / 597mm rims because the tire selection now is poor. I would consider going one size up or one size down with rims. If you opt for 36-hole drilling, you have some additional options for wheels and hubs. But some people like to stick to 40 / 32 drilling because it was so much a part of the vintage, English system of building bikes.
A typical upgrade for a bike like this would be a medium-ratio AM or FM rear hub, for a sportier ride. A Hercules wide ratio three speed or a Sturmey AW would be more available in terms of hubs and parts on the market today. The Sturmey FW four speed gives you an extra low gear if you need more climbing power. The FW can also be converted to a 5-speed with a few changes.
It's a nice frame and a fine project.
__________________
Classic American and British Roadsters, Utility Bikes, and Sporting Bikes (1935-1979): HERE
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Last edited by SirMike1983; 01-30-26 at 11:05 AM.
#29
Mike J

Joined: Sep 2020
Posts: 296
Likes: 491
From: Jacksonville Florida
Bikes: 1974 Peugeot UO-8 1962 Peugeot PL-10, 1974 Motobecane Grand Record
It's maybe too small to build as a drop-bar bike. (Although I have no idea how to fit a frame this old. Things were different then.) 21" seat tube, but the 22-1/2" top tube is the same as on my 23-1/2" Raleigh Competition. With the parallel head and seat tubes, they could get away with only cutting one top tube for both frames? Right now, I'm thinking something North-Road-ish / Albatross-y. Nice looking, newish, and aluminum.

Last edited by jj1092; 01-30-26 at 04:02 PM. Reason: Can't spell
#30
It's not so much that I'm avoiding drop bars, as it is that I want this bike to be delightfully weird, and that pretty much requires weird bars that delight me.
Flipped cheap-o aluminum North-Road-ish bars, (or even those Schwinn ones that get raved about around here... if they're as good as their rep, somebody not named Shannon should get somebody named Nitto to make them in aluminum,) are probably where I'm going to start.
--Shannon
Flipped cheap-o aluminum North-Road-ish bars, (or even those Schwinn ones that get raved about around here... if they're as good as their rep, somebody not named Shannon should get somebody named Nitto to make them in aluminum,) are probably where I'm going to start.
--Shannon
#32
Senior Member

Joined: Dec 2016
Posts: 2,921
Likes: 1,787
From: Long Island, NY
Bikes: Trek 800 x 2, Schwinn Heavy Duti, Schwinn Traveler, Schwinn Le Tour Luxe, Schwinn Continental, Cannondale M400 and Lambert, Schwinn Super Sport
Flipped cheap-o aluminum North-Road-ish bars, (or even those Schwinn ones that get raved about around here... if they're as good as their rep, somebody not named Shannon should get somebody named Nitto to make them in aluminum,) are probably where I'm going to start.
--Shannon
--Shannon
#33
Bar-wise, I'll probably start with the Dimension N/Rs on my GT Karakoram, (which I think I'm gonna sell,) once it gets out of storage jail in Eureka. Because, you know... broke.
--Shannon
--Shannon
#34
I am thinking this frame may be a bit later than 1949. It has a newer badge. The very nice catalogue photograph nlerner provided has the old style badge. I'd estimate this to be a 1950s bike. And yes, looks like a Kestrel frame with original paint and some graphics left. It is well-preserved. It was a sporty frame in its day with good tubing and lugs.
So, in the absence of any actual evidence, I'm calling it a 1950. Which is rad.
--Shannon
Last edited by ShannonM; 01-31-26 at 02:21 AM.
#35
Senior Member



Joined: Dec 2005
Posts: 18,757
Likes: 11,483
Seeing this sent me back to the Internet. While I can't find a 1951 catalog for the Kestrel Club, by '52 the 'Polychromatic Gold' seems to have been dropped. And I did find the page for the '51 Kestrel Senior Club, which was green. The new head badge looks to be a 1950 introduction... made it the main cover image, even.
So, in the absence of any actual evidence, I'm calling it a 1950. Which is rad.
--Shannon
So, in the absence of any actual evidence, I'm calling it a 1950. Which is rad.
--Shannon

1951:

#38
Thanks, Homie!!
1950 it is, I'd say. And will say from now on.
By (three, sequentially employed,) online calculators, (1950 - 2017 system conversion, 2017-2026 GBP inflation, GBP --> USD,) I come up with $948.56 as single-speed, plus whatever the AW would have added. Which seems about right, given what its close equivalents cost these days.
--Shannon
1950 it is, I'd say. And will say from now on.
By (three, sequentially employed,) online calculators, (1950 - 2017 system conversion, 2017-2026 GBP inflation, GBP --> USD,) I come up with $948.56 as single-speed, plus whatever the AW would have added. Which seems about right, given what its close equivalents cost these days.
--Shannon
Last edited by ShannonM; 01-31-26 at 11:48 PM.
#39
I stopped by the BikeTopia co-op in Berkeley this evening to see if they had anything for the project. They didn't have much, but they did have a 1962 AW hub:

It's missing its oil port fitting, and it's a 40-hole, but at worst I'll get the experience of rebuilding this one... I've never had one before. If I can find a 36-hole one, awesome. If not, 40-hole 650b rims are a thing. An over-a-hundred-bucks thing, but it are what it are.
--Shannon

It's missing its oil port fitting, and it's a 40-hole, but at worst I'll get the experience of rebuilding this one... I've never had one before. If I can find a 36-hole one, awesome. If not, 40-hole 650b rims are a thing. An over-a-hundred-bucks thing, but it are what it are.
--Shannon
#40
American Cyclery in San Francisco is having their 'Sidewalk Sale' inside their legendary shop this weekend, so I decided to swing by and see if I could find anything interesting for the Kestrel.
I was mostly looking for three things:
A high-rise stem that wouldn't took too stupid on this frame.
Some kind of handlebar that was headed in the same 'weirdo mid-century 3-speed gravel bike' direction that I'm going.
A 40, or even better, a 38-toothed, 128 millimeter BCD-having chainring.
Guess which 2/3s came home with me?
(If the chainring is one of your two guesses, well, as my boot camp Company Commander was so fond of saying, "You are wrong.")
80 mm Kalloy dirt drop stem and some kind of chrome steel 'all-rounder' bend bars. 20 bucks.
With the B17N on the looks-wrong-but-fits Kalloy at about the same height as the Raleigh and the stem at the line, we get this:

The bars dropped some rust flakes when I pulled the (reusable) grips, so they're getting a vinegar soak. Followed up with the baking-soda-volcano treatment. (It works great on grotty drains, so why not?)
With the 80 mm stem, I get about 1cm less reach than the Raleigh, which is exactly what you'd expect, given the same top tube lengths on both bikes. Looks like, even with a longer stem, forward-going bars are going to be the way. I sure don't think I'd want more back-reach.
I'd kept the OG GB bars from the Raliegh, so as I was writing this very post, right after I wrote the above paragraph, the gnomes from the Cave of Bad Ideas sent one up into my brain: "Hey, I wonder what drops would look / measure like?"
They look like this:

I get about the same reach, give or take different bars, and about 3/4-ish cm more saddle drop. Obviously, with that short head tube, full drops are not going to be the Way, at least not with this stem.
I'm nowhere near building her up, so it's fun to play around as I accumulate parts. It's all interesting... the way the details in my head change as I stick various parts on the frame, but still staying within the scope of the initial inspiration.
--Shannon
I was mostly looking for three things:
A high-rise stem that wouldn't took too stupid on this frame.
Some kind of handlebar that was headed in the same 'weirdo mid-century 3-speed gravel bike' direction that I'm going.
A 40, or even better, a 38-toothed, 128 millimeter BCD-having chainring.
Guess which 2/3s came home with me?
(If the chainring is one of your two guesses, well, as my boot camp Company Commander was so fond of saying, "You are wrong.")
80 mm Kalloy dirt drop stem and some kind of chrome steel 'all-rounder' bend bars. 20 bucks.
With the B17N on the looks-wrong-but-fits Kalloy at about the same height as the Raleigh and the stem at the line, we get this:

The bars dropped some rust flakes when I pulled the (reusable) grips, so they're getting a vinegar soak. Followed up with the baking-soda-volcano treatment. (It works great on grotty drains, so why not?)
With the 80 mm stem, I get about 1cm less reach than the Raleigh, which is exactly what you'd expect, given the same top tube lengths on both bikes. Looks like, even with a longer stem, forward-going bars are going to be the way. I sure don't think I'd want more back-reach.
I'd kept the OG GB bars from the Raliegh, so as I was writing this very post, right after I wrote the above paragraph, the gnomes from the Cave of Bad Ideas sent one up into my brain: "Hey, I wonder what drops would look / measure like?"
They look like this:

I get about the same reach, give or take different bars, and about 3/4-ish cm more saddle drop. Obviously, with that short head tube, full drops are not going to be the Way, at least not with this stem.
I'm nowhere near building her up, so it's fun to play around as I accumulate parts. It's all interesting... the way the details in my head change as I stick various parts on the frame, but still staying within the scope of the initial inspiration.
--Shannon
#41
Full Member


Joined: Feb 2018
Posts: 306
Likes: 184
Can the internal parts be interchanged between the Hercules and S-A hubs? My Hercules doesn't shift to high gear, I'm not sure if I assembled it wrong or if it has some worn out pieces. I used the S-A instructions to attempt to rebuild it and everything looked the same, but I couldn't tell if there were minor differences in dimensions. I have a good S-A hub that I could salvage the internals from. It's from a folding bike with 28 spokes or I would just re-lace the wheel.
__________________
TigerTom
TigerTom
#42
More parts, more test fittings, more pondering... more pictures.
I went today to visit the wonderful mammals at Street Level Cycles. (Who are awesome, and to whom you should give money.) Poking around in the bins, I came across another, longer, taller, Kalloy dirt-drop-ish stem. This one's a 100mm, of unknown model. (95-11 is the only stamping that might be a model #.) I didn't find much else in the bin-o-bars that interested me, except a set of Scott AT-2 LF ultra-light MTB bars. (Which wouldn't probably look right on the Herc, but I figured I might need 'em, at least at first, and they were 5 bucks, so I bit.)
I did some mocking up, and... big diff!
With All-Rounders:


With drops:


And, just for fun, with the AT2s:

Cockpit views of each:



Much-a mo' betta!
I also found a 95mm OLD, 36-hole Normandie front hub... looks to be a 'Schwinn Approved' one.

It needs some love, but it's going to rain the next few days, and I haven't pulled a hub apart in many years... looking forward to it!
--Shannon
I went today to visit the wonderful mammals at Street Level Cycles. (Who are awesome, and to whom you should give money.) Poking around in the bins, I came across another, longer, taller, Kalloy dirt-drop-ish stem. This one's a 100mm, of unknown model. (95-11 is the only stamping that might be a model #.) I didn't find much else in the bin-o-bars that interested me, except a set of Scott AT-2 LF ultra-light MTB bars. (Which wouldn't probably look right on the Herc, but I figured I might need 'em, at least at first, and they were 5 bucks, so I bit.)
I did some mocking up, and... big diff!
With All-Rounders:


With drops:


And, just for fun, with the AT2s:

Cockpit views of each:



Much-a mo' betta!
I also found a 95mm OLD, 36-hole Normandie front hub... looks to be a 'Schwinn Approved' one.

It needs some love, but it's going to rain the next few days, and I haven't pulled a hub apart in many years... looking forward to it!
--Shannon
Last edited by ShannonM; 02-14-26 at 10:53 PM.
#43
Now I'm thinking about dirt drops... On One Midges, maybe Nitto RM-03.
Once I get my stuff back from storage, I'll pull the cheapo north road-ish bars off the GT Karakoram, which I'm going to sell. Then I'll mock those up too, and take dumb pictures, and add them to this self-indulgent build thread.
--Shannon
Once I get my stuff back from storage, I'll pull the cheapo north road-ish bars off the GT Karakoram, which I'm going to sell. Then I'll mock those up too, and take dumb pictures, and add them to this self-indulgent build thread.
--Shannon
#44
First cut of my first attempt at polishing a bike part. (And I do mean 1st attempt. In 40 years of riding and working on bikes, I've not ever done any restoration-type stuff. It's looking like being fun.)
The Schwinn-Approved Normandy Sport front hub as found:

After disassembly and one round of Mother's. Going to do one more and see what I get.

All the steel bits are soaking in vinegar. I just ordered the 3/16" G25 bearings, so rebuild should be tomorrow.
I also got some 1/8" balls for the BSA-style headset, so that'll get done while it's all rainy and stuff.
--Shannon
The Schwinn-Approved Normandy Sport front hub as found:

After disassembly and one round of Mother's. Going to do one more and see what I get.

All the steel bits are soaking in vinegar. I just ordered the 3/16" G25 bearings, so rebuild should be tomorrow.
I also got some 1/8" balls for the BSA-style headset, so that'll get done while it's all rainy and stuff.
--Shannon
#45
aka Tom Reingold




Joined: Jan 2009
Posts: 44,126
Likes: 6,342
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
You're entertaining me, so it's not entirely self-indulgent.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
#46
Junior Member

Joined: Feb 2023
Posts: 172
Likes: 548
Bikes: Take a look, if you have the time, https://www.flickr.com/photos/8379107@N03/collections/72157603319548765/ time.
First cut of my first attempt at polishing a bike part. (And I do mean 1st attempt. In 40 years of riding and working on bikes, I've not ever done any restoration-type stuff. It's looking like being fun.)
The Schwinn-Approved Normandy Sport front hub as found:

After disassembly and one round of Mother's. Going to do one more and see what I get.

All the steel bits are soaking in vinegar. I just ordered the 3/16" G25 bearings, so rebuild should be tomorrow.
I also got some 1/8" balls for the BSA-style headset, so that'll get done while it's all rainy and stuff.
--Shannon
The Schwinn-Approved Normandy Sport front hub as found:

After disassembly and one round of Mother's. Going to do one more and see what I get.

All the steel bits are soaking in vinegar. I just ordered the 3/16" G25 bearings, so rebuild should be tomorrow.
I also got some 1/8" balls for the BSA-style headset, so that'll get done while it's all rainy and stuff.
--Shannon
#47
You can use some 0000 steel wool on the hub shell, and then Mothers. Will make it much shinier. While you are at it, you might as well see if you can polish the running surface on the cones. Normandy cones weren't ground or polished. Put them on the axle and chuck it up in your drill press if you have one, then use a 3M polishing wheel in a hand drill to shine them up. I've done that to lots of irreplaceable or otherwise not useable cones. Bob Freeman
What I'd do would be to pack the hub with polishing goop and then, I dunno... sit in front of the tube and spin it in the fork? Ride it around the block a couple of times?
The parts look decent as is, so I probably won't bother, but thanks for the tip. It'll come in handy fo' sho'.
--Shannon
#48
Freewheel Medic



Joined: Oct 2005
Posts: 13,547
Likes: 3,287
From: An Island on the Coast of GA!
Bikes: Snazzy* Schwinns, Classy Cannondales & a Super Pro Aero Lotus (* Ed.)
I need a little help in order to help Shannon out.
I'm donating this 1949 SA AW IGA to his Hercules project, but before I unlace the hub from the rusty Schwinn rim, he'd like for me to remove the sprocket. I've not had a chance to go digging through the internet for the answer. How is the sprocket unthreaded from the hub? Thanks for the guidance.


I'm donating this 1949 SA AW IGA to his Hercules project, but before I unlace the hub from the rusty Schwinn rim, he'd like for me to remove the sprocket. I've not had a chance to go digging through the internet for the answer. How is the sprocket unthreaded from the hub? Thanks for the guidance.


__________________
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
#49
Phyllo-buster


Joined: Jan 2010
Posts: 9,260
Likes: 2,683
From: Nova Scotia
Bikes: roadsters, club bikes, fixed and classic
The pics not quite clear to me. If it has a circlip, then two small screwdivers can be used to prise the retaining clip out of the slot and the cog slips off. A threaded driver/cog is fussier. You can dismantle the assembly, clamp the driver in a bench vise, then use heat and chain whip.
OP, maybe a 50's hub without the threaded driver is a better option if you want to swap cogs?
OP, maybe a 50's hub without the threaded driver is a better option if you want to swap cogs?
#50
Freewheel Medic



Joined: Oct 2005
Posts: 13,547
Likes: 3,287
From: An Island on the Coast of GA!
Bikes: Snazzy* Schwinns, Classy Cannondales & a Super Pro Aero Lotus (* Ed.)
The pics not quite clear to me. If it has a circlip, then two small screwdivers can be used to prise the retaining clip out of the slot and the cog slips off. A threaded driver/cog is fussier. You can dismantle the assembly, clamp the driver in a bench vise, then use heat and chain whip.
OP, maybe a 50's hub without the threaded driver is a better option if you want to swap cogs?
OP, maybe a 50's hub without the threaded driver is a better option if you want to swap cogs?

The appeal of this hub is it is 36H instead of the more ordinary 40H. However, I do have 40H Sun CR18 rims I can also supply.
__________________
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com



