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Posts Tagged ‘Trek’

Chain Wear Updates

Friday, June 7th, 2013

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I’ve been continuing my no-solvent, lube-only maintenance schedule on all of my chains.  In the last chain wear post the Dura-Ace 7901 chain on the old Trek was showing 1/10 wear. It’s now just about three months and 1000km later and the chain is still showing 1/10 wear. I was expecting some measurable wear after a few very wet rides, but that hasn’t been the case. So, this Dura-Ace chain is just shy of 15 months and 3500km and still shows almost no wear. Not bad.

On the other hand, the cyclocross bike and it’s Ultegra HG-93 9-speed chain arean’t doing so well. At the last check, the chain was at 6/10 wear. Now, after three months and only 300km it’s at 10/10. Likewise, the HG-93 chain on the 1×9 hardtail was at maximum wear and replaced four weeks ago after 1390km and 17 months of use. The chain was replaced with a Dura-Ace 7701 that’s been used for about 100km.  The cyclocross bike will get the same 7701 chain.

  • Road/Dura-Ace 7901 (10-speed): 15 months, 3500km, almost no wear
  • CX/Ultegra HG-93 (9-speed): 19 months, 1735km, to be replaced
  • MTB/Ultegra HG-93 (9-speed): 17 months, 1390km, replaced
  • MTB/SRAM PC-1 (SS): 6 months, 235km, didn’t bother checking

Chain Wear

Thursday, February 21st, 2013

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I installed a new 10-speed Shimano Dura-Ace (CN-7901) chain on the 1994 Trek 2120 in February 2012, and in the following year I rode it 2,743km (1,705 miles).  Durring that year I only used Rock ‘n Roll Red lube, every other ride, or so.  I also adopted the no-solvent, lube-only style of chain maintenance, so the chain was never removed or degreased.  If the chain was gritty from a wet ride, I just flushed it with more lube until it was clean.

How did it do?  Well, according to my Pro-Link chain wear gauge, the chain is showing 1 / 10 wear, with 0 being new and 10 being worn.  Some have demonstrated that this type of gauge over estimates chain wear.  According to my ruler it has no discernable wear.   I’m going to continue the same maintenance regiment.  At this rate, the chain could possibly outlast the 18-year-old Trek.

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According to a recent test from Bike Rumor, Shimano 10-speed chains tend to last longer than their 9-speed equivalents.  I don’t have any 9-speed road bikes to directly compare, but I do have a 2×9 cyclocross and a 1×9 hardtail MTB.  The Shimano Ultegra/XT HG-93 chain has been on the cyclocross bike since November 2011 and has be used for 1415km (880 miles).  The hardtail’s chain, also a Shimano Ultegra/XT HG-93, was installed in December 2011, has gone through some often dusty and sometimes muddy 1153km (716 miles).  It has had similar maintenance to the Dura-Ace chain, but with Rock ‘n Roll Gold.  The cyclocross chain is showing 1 / 10, and the hardtail is at  6 / 10.  While the HG-93 chain on the cyclocross seems to be doing well, the  hardtail’s chain will probably need to be replaced around the 2000km mark.  Fortunately, I have a Dura-Ace/XTR 7701 chain to go on the hardtail when the time comes.

The singlesspeed has a 1/8″ SRAM PC-1 chain, and is showing 5 / 10 wear after one month and 55km (34 miles) of use.  Why?  I have no idea.  The last chain was on for just under a year and just over 900km (560 miles).  It was replaced when it was showing 10/10 wear.  Both the cog and chainring are also about a year old with the same use as the chain, and are in very good shape.  I would swap the PC-1 for a 10-speed Dura-Ace 7901, but I unfortunately have a 1/8″ chainring.

Trek 2120: Now More Shiny

Tuesday, February 14th, 2012

If you look closely, or perhaps quickly glace at the Trek with it’s new(ish) Ultegra 6600 components, you’ll likely notice that the 6600 crankset isn’t the nicest looking one out there, but also the general increase in shiny parts.  Yep, the brakes, derailleurs, hubs, crank, stem and headset are all shined to a (relatively) high polish.

This was a problem.  The original 1050-series 105 parts are nice, but not shiny.  The downtube shifters and levers are a perfectly nice glossy grey, but again, not polished or shiny.  This could be solved one of two ways:  First, swap the levers for shiny Shimano R600s and the downtube shifters for shiny Dura-Ace 10-speed.  This would also require both a 10-speed chain and cassette.

The second option was to replace both the levers and down tube shifters with a pair of those amazing new levers and shifters in one.  Now, I suppose Ultegra 6600 levers would make sense, but I really don’t care for the side-exit shifter cables, and they are quite possibly uglier than the Ultegra 6600 crankset.  So, Ultegra 6700 levers would seem to be the obvious choice, but they’re not.

Ultegra 6700 levers are not shiny.  Nope.  In fact, they are mostly black with grey-painted plastic/composite levers.  Blah.  Not that it would work with my lowly Ultegra 6600, but Dura-Ace 7900 levers suffer a similar dull and boring fate.  But, 105 5700 is shiny.  The levers are almost always boring black, but polished silver can also be had for the discerning few.

Ok, so the 105 5700 levers are shiny, and Ultegra 6600 is shiny.  Being somewhat open to new technology, I went with the scary (but shiny) world of integrated brake/shift levers.  I still needed that 10-speed cassette and chain, so I used this same shiny-metric to choose these.

Like the levers, Ultegra 6700 cassettes are not shiny.  But, also like the levers, 105 5700 cassettes are shiny.  Even though someone may be able to make the argument that the Ultegra cassette weighs one baby carrot less than the 105, and the shift ramps would allow me to shift three more times per minute, I don’t care.  One 105 5700 12-25 10-speed cassette coming up. Easy.

Next, unlike other components, the level of shine on a shimano chain is directly related to and improves as you spend more.  So, 105 5701 chains are dull and ugly.  Ultegra 6701 chains are half shiny and half dull, but mostly ugly.  Dura-Ace 7901 chains are all shiny and, as you can see,  clearly not ugly.  Done.

Is a smile complete without a shiny gold tooth?  Nope. That shiny Dura-Ace chain is held together with an even shinier gold KMC 10-speed quick link.  Don’t even get me started on the flat black SRAM 10-speed link–  Not shiny.

Moving on, both the stem and headset were also replaced.  The original Tange Levin CD headset was getting quite indexed.  I found a nearly identical Tange Levin CDS headset in Kansas, but it had the added benefit of being polished chrome where the original was non-polished silver/grey.  The original stem, also non-polished silver/grey, was working just fine, but it was of the 90° variety and I wanted the bars a little lower.  The new 73° stem is both lower and shinier.  I also added a subtle detail to better coordinate the stem and bars.  Can you spot it?

Non-shiny upgrades include Shimano SLR/SP41 cables and housings as well as some new bar tape.  The bar tape is SRAM Super Suede, and it’s very super.  I also have a new pair of Open Corsa Evo CX tyres, but the current Open Corsas still have some life in them, so they’ll stick around for a little while longer.

Anyway, just to sum up and help you navigate the current offerings from Shimano, I’ve included this decidedly non-shiny chart ranking selected current-generation Shimano components by shininess:

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