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Messages - RussSeaton

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Gear Talk / Re: Gear increments
« on: June 20, 2012, 10:09:43 pm »
On my recumbent, the granny on the triple is tiny but it only provides a very small difference in the middle ring/large cog gear. I only need it occasionally but I'm glad it's available.

I'm curious to know what chainrings you have on this bike.  I have two bikes with triple cranksets.  One is 52-42-24 and the other is 44-33-20.  There is a very noticeable difference between the middle ring and the inner ring no matter which cog on the cassette I am using.  The 52-42-24 triple uses a 13-28 cassette in the mountains.  There is a world of difference between 42x28 and 24x28.  The 44-33-20 triple uses a 11-32 cassette.  There is a pretty good size difference between the 33x32 and 20x32 gears.

Lots of people for unknown reasons leave their triple cranksets as it came from the bike factory.  They are not wise enough to put on the smallest possible inner chainring.  Road bike cranksets come with triples with 53-39-30 chainrings.  That 30 tooth inner ring is idiotic.  All these cranksets use 74mm bcd inner rings and can accept a 24 tooth inner ring.  Why people use triples with 30 tooth inner chainrings that aren't much lower than the 39 middle ring instead of a truely low 24 tooth inner ring is a mystery.

Gear Talk / Re: Gear increments
« on: June 19, 2012, 05:20:07 pm »
A no longer used gearing pattern called Half-Step Gearing gives very consistent steps between every gear.  It has a unique, repeated shifting pattern for every shift.  It requires shifting the front derailleur on every shift.  And half the shifts require shifting both the front and rear derailleurs simultaneously.  But you do get that nice even consistent shift between every gear.  With modern 9-10 speed cassettes and triple mountain cranksets with limited choices for chainrings, and very expensive rings, the era of half-step gearing has probably passed.  Its more of a novelty to be different than a useful gearing pattern today.

I assume you want even steps between gears when shifting the rear derailleur.  You will more or less leave the chain on one of the chainrings in front, outer or middle, and shift up and down the rear cassette.  To get nice even smooth shifts on the rear cassette you want minimal jumps between cogs.  Something like 13-14-15-16-17-18-19-21-23 for a 9 speed cassette produces super smooth steps.  On small cogs you want small jumps.  On bigger cogs you want bigger jumps.  Its a percentage thing.  1 tooth divided by 12 teeth is 8.3%.  2 teeth divided by 19 teeth is 10.5%.  3 teeth divided by 28 teeth is 10.7%.  Close enough.  Even jumps in percentage.  Problem is you can't get exact jumps due to the fact cogs are available in 1 tooth jumps only.  Percent difference between 11-12-13-14-15-16-17 is not exactly the same.  Fairly close though.

For a touring bike you want 1-2 tooth jumps on the small cogs and 2-3 tooth jumps on the medium cogs and 4 tooth jumps on the large cogs.  For 9 speed cassette Shimano makes a XTR 12-34 cassette.  12-14-16-18-20-23-26-30-34.  SRAM makes a 1070 10 speed cassette in 12-32.  12-13-14-15-17-19-21-24-28-32.  Both of these cassettes provide smooth jumps between cogs in the back.  Shimano and SRAM also make 9 and 10 speed cassettes in 11-32, 11-34, 11-36 with sort of similar jumps in cogs to those listed above.

The problem with a touring bike is you want a wide range in the cogs.  From 11 or 12 or 13 or 14 on the small cogs to 32 or 34 or 36 on the big cogs.  That is about 20-22 tooth spread.  You have to have kind of big jumps in cogs to cover that range with 9 or 10 cogs on the cassette.  With racing bikes you have cassettes that go from 11 or 12 on the small cog to 23 on the big cog.  So you are covering 11 or 12 teeth spread with the same 9 or 10 cog cassette.  You are covering half the range with the same number of steps.  Easier to get the steps really close and smooth.  The original cassette on your hybrid bike was maybe 12-25.  The new cassette you have to get the lower gears is 11-34.  The range is about twice as big with the new cassette.  Yet you still only have 9 shifts to cover it.  Jumps between cogs are not as incremental.

Gear Talk / Re: Le Mond bikes - anyone know them?
« on: June 10, 2012, 02:00:05 pm »
LeMond was a Trek brand of bike from about mid 1990s through mid 2000s.  LeMond stopped racing in the mid 1990s.  LeMond bikes are Trek bikes.  Trek made LeMond bikes.  I'm pretty sure there were no touring models in the LeMond lineup.  Racing and sport touring models only.  Cyclocross too.  Go for a bike ride and you will see a few LeMond bikes.  They are common.  Trek discontinued the LeMond brand of bike after the LeMond/Armstrong feud got too intense.  Trek could not reconcile sponsoring Armstrong as a racer and LeMond as a bike brand and having them feuding.  I would not be surprised if LeMond bikes were just an alternate to Trek bikes and did not add to more revenue.  The brands were essentially competitors.  They did not serve different markets.

Routes / Re: Denver to Charleston,Illinois
« on: June 04, 2012, 07:48:56 pm »
Back in 2006 I did a 750 mile brevet going from Boulder to 100+ miles into Kansas and back.  We picked up US36 a few miles east of Denver.  Strasburg.  US36 seems to start by I-70 a few miles east of Denver.  We rode the shoulder of US36 all the way to the Kansas-Colorado border and then 100+ miles into Kansas.  It was an OK road to ride.  Not much traffic.  Hills were big rolling ones.  Lots of flat too.  We were on US36 for about 300 miles in each direction.  Once you get further east in Kansas you would likely want to get off US36 and onto smaller state roads.  Traffic probably picks up the further east since the east is where all the people live in Kansas.  And in Colorado no one lives in the eastern third so no traffic.

Gear Talk / Re: Ultegra (Carbon) vs. 105 (Aluminum) Shifters
« on: June 03, 2012, 04:16:46 pm »
I have Shimano 5703 shifters on the touring bike.  Aluminum STI levers shift my 44-33-20 triple just fine.  11-32 ten speed cassette.  I have carbon Shimano 7970 shifters on my carbon racing type bike.  Crashed on it this morning.  No harm done to the shifters.  Rubber hoods got a few extra scrapes.  I'd say carbon shifters are tough enough.  I'd probably give the edge to aluminum STI levers but...

Gear Talk / Re: Bottom bracket replacement - 118 vs 110
« on: May 21, 2012, 03:18:33 pm »
When replacing bottom brackets I try to get one as short as possible while not having the inner chainring hit the chainstays.  And another thing to consider is whether the inner cage of the front derailleur will hit the seattube if you adjust it to shift onto the inner chainring.  If the bottom bracket is too short the front derailleur just won't be able to shift to the inner chainring.  Several things to worry about.  Really the only thing you can do is try the shorter bottom bracket to see if it will work.

Would sandals be better?  The toes are open so if your toes curled up, nothing would really be bothered.  I know you said you prefer the stiff Specialized shoes over more flexible Shimano shoes.  But I've always had comfortable feet when riding with sandals.

Gear Talk / Re: Touring Bikes Under Consideration
« on: May 17, 2012, 02:48:27 pm »

The current Trek 520 comes with Shimano M543 Trekking crankset.  It comes from Shimano in two configurations.  Either 44-32-22 rings or 48-36-26 rings.  Personally I would change the whole crank to the 44-32-22 model if your dealer would do it.  You want as low an inner chainring as possible.  So no matter what get them to put on a 22 inner ring to replace the 26 ring.  The bike comes with a 9 speed 11-32 cassette.  So a 44x11 high would be plenty high for any touring bike.  The 48x11 high Trek specs is way too high for anything except coasting down mountains.  Kind of demonstrates Trek does not employ people who ride bikes.  Their bike spec person is clueless.  If buying this bike see if the dealer will put on a 11-34 cassette instead.  On a touring bike you want as small a front chainring as possible and as big a large cog as possible.

Routes / Re: USA touring routes - September?
« on: May 16, 2012, 12:54:37 pm »
Since you are flying in from Ireland, you have unlimited choices for starting location.  Another option might be to fly into Miami or Atlanta and then do the Atlantic Coast route up north.  Have to ride a couple days from Atlanta to catch the route.  You could end the ride in Washington DC, New York City, or Boston.  Depending on how much time you have and miles you want to ride.  All those towns have things for tourists.  You've seen the Pacific coast so this would give you a chance to see the Atlantic coast.  Should see plenty of tree leaves changing the further north you get.

Routes / Re: USA touring routes - September?
« on: May 15, 2012, 10:35:01 pm »
Where you live will likely affect where you want to start.  You mentioned the Pacific Coast so I am assuming you live near there.  Maybe not.  So Fred's idea of the NorthEast may not be good if you live on the west coast.  September would be a good time to see fall foliage in the upper midwest.  Maybe either the Northern Tier or Lewis&Clark routes.  Maybe start in Montana and go east on the Northern Tier to Minnesota or Wisconsin.  Wherever the Northern Tier crosses the Mississippii River route.  I think there is a route that follows the Mississippii River starting in Minnesota.  Follow that route down to St. Louis and hook up with the Lewis&Clark route.  Then follow the Lewis&Clark back to Montana.  September-October is pleasant weather in the upper midwest.  Generally not hot or cold.  Starting a bit into Montana and the Rockies should be behind you.  So no early mountain top snowfall to worry about.  The wide open, sparse, unpopulated, empty nature of these routes appeals to me.

Gear Talk / Re: Replacing old RSX chainrings and/or crankset
« on: May 08, 2012, 02:05:15 pm »
Use your existing old 7 speed crankset.  Get new chainrings.  TA and Stronglight sells very nice ones.  Expensive though.  Salsa and a few others sell lower cost ones.  It does not matter what gear number the rings are for, they will fit your crank and shift your 7 speed just fine.  7, 8, 9, 10, they all will work fine.  Have no idea why you say rings are hard to find.  110mm and 74mm bcd 5 bolt chainrings are very common.  Many companies make them.  Every bike shop in the world can get them.  The 110mm bcd allows rings from 33 to the 50s teeth.  The 74mm bcd allows down to 24 teeth.

I have a 1991 Shimano Deore DX 7 speed crankset.  I changed the touring bike from 7 speed cassette to 10 speed cassette.  I replaced the rings with TA Zephyr 44 outer, Stronglight CT2 33 middle, and I have a 20 tooth inner ring.  Uses an Avid adapter thing.  10 speed Shimano chain.  10 speed SRAM 11-32 cassette.  Shimano 5700 STI shift levers.  Shifts perfectly fine.

For you I would suggest a 48 or 46 or 44 outer ring.  A 33 or 34 middle ring.  And a 24 tooth inner ring.  With the 12-32 cassette (12-14-17-20-24-28-32) you will have a low of 24x32.  Low enough.  The high will be plenty high no matter what outer ring you get.  Any chainrings marked for 7-8-9-10 will work fine with your 7 speed chain and cassette and crankarms.  Since your crank is 74mm bcd for the inner ring, 24 tooth is the lowest inner ring you can go.

I like chainrings spaced 10 or 12 teeth different.  14 teeth difference will also work.  But 10 or 12 different makes a good difference between rings.  So 44-34-24 rings is very good.  With a 7 speed 12-14-17-20-24-28-32 cassette, you will use the 44 and 34 rings for 99+% of your riding.  The 44x12 gear is high enough.  If you need to go faster, coast.  Rings of 46-34-24 will give you a little higher high, 46x12.  Some might be happier with a higher high gear.  If so, fine.  The 24x32 low gear is about 20 gear inches.  Low enough.  Not super duper low, but its low enough to get a loaded bike up just about any hill or mountain.  Might have to stand up and work hard for a short distance.  20 years ago I toured Europe with a low gear of 24x32 and made it up the Dolomites and Pyrennes and Alps.

Gear Talk / Re: Surly Disc Trucker v. LHT
« on: May 07, 2012, 04:46:36 pm »
I have seen a lot of LHTs, but I have never seen one with panniers on it.  The tubing diameter looks small to be stiff enough to tour on.  I ended up with a custom touring bike because my light touring  bike that came from the LBS wiggled with 60 pounds of gear on it.

Cannot speak for the Long Haul Trucker specifically.  But I had a 1991 Trek 520, their touring bike.  It had a steel frame with skinny tubes like the LHT.  I never experienced any wiggling of the frame descending mountains at 40 mph with front and rear panniers, handlebar bag, and rear rack bag.  I tend to think all bikes are more than stiff enough for anything.  People who complain about stiffness of a bike says more about them than the bike.

Gear Talk / Re: Tire width - 28 too narrow for touring?
« on: May 06, 2012, 02:32:35 pm »
I use wide 35mm tires for the touring bike.  But in your case, why can't you buy some 28mm tires for the 95% riding and put the 32mm tires back on when you go touring.  Carry one of the 28mm tires as a spare tire.  Then switch the tires back when you are done touring.  Tires are not that expensive.  Buying another set of tires can't be that big of a financial burden.

Gear Talk / Re: Surly Disc Trucker v. LHT
« on: May 04, 2012, 04:03:43 pm »
Considering what you would spend on a Surly or LHT you might consider having a custom bike made.

I don't think the prices are that comparable.  $1200 for a LHT at my local bike shop.  Rock Lobster sells a custom touring bike for about $1600 for frame and fork.  Not sure he is the cheapest but pretty close to being the cheapest custom bike maker.  Figure another $800 at least for parts for the touring bike.  You are looking at about double the price for a custom over the LHT.  Not saying you should not get the custom touring bike.  It may be the best, finest, greatest bike ever.  But it will cost you at least double what the LHT costs.  Prices for steel utilitarian bikes are not comparable between custom and a big factory bike maker.

Gear Talk / Re: 2012 Novara Randonee rear rack
« on: April 22, 2012, 06:36:14 pm »
The REI Novara Randonee rear rack uses 10mm / 3/8" solid aluminum tubing.  It looks like a very good rack to me.  I would not hesitate to use it for any loaded touring.

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