Sunday, October 27, 2013

Avid Elixir CR Warble Fixed with Brake Quiet

My Avid Elixir CR rear brake made horrible, wretched noises on my Yeti ASR from day one. I tried a few different suggestions from the MTBR Avid turkey warble thread, but nothing worked until I tried Brake Quiet (suggested by TiGeo). I got the Carquest brand of Brake Quiet which is simply CRC rebranded. I squeezed some on the backs and used a credit card to leave just a thin film. I left them alone for a few hours to dry. Note: they are still tacky when fully dry. The only problem I had was these are new pads and with the film they fit too tight, such that the rotor rubbed. I didn't have bleeding tools so that wasn't an option, but after a few downhill rides they had worn enough to not rub. My brakes are 100% quiet now! BTW, I'm using plain old Avid rotors (steel).



http://forums.mtbr.com/brake-time/juicy-brake-turkey-warble-vibration-mega-thread-425196-37.html#post9603127

Thursday, July 11, 2013

Broken WTB Titanium Rocket V Saddle

My WTB Rocket V came apart on a recent ride. The weird thing is it wasn't a crash; I was riding on rolling singletrack when it separated from the rails. You can see from the photo that the plastic cracked at this nose. I bought the seat used on ebay and the seller said it was only a few years old. I did have a one minor crash on this seat but I crashed the hell out of my WTB Pure V and it never had problems. I always thought the saddles were something that would last just about forever, assuming no catastrophic crashes. I contacted WTB and they said it's not repairable. This is disappointing because the titanium rail is in perfect shape. It seems the rail is heat molded into the plastic on the saddle, so there's no way to repair it. I read on mtbr forums that some have been able to coerce a rail into a seat but it takes exceptional hand/arm strength.




Friday, July 5, 2013

Hydration Drink Mixes Price Per Pound

I've tried a several sport drink/hydration mixes at varying prices and wondered if you really get what you pay for. The lowest cost mix that I know of is good ole Gatorade. I've found the lemon-lime at Costco for around $7 for a giant container -- I think it was 6lbs. I don't care for lemon-lime so this just wasn't palatable at any price. I can get the orange flavor at Target for $4.44 for 1.125 pounds. This is quite affordable a $3.95 per lb and I find the orange flavor quite tasty. Ingredients include:

sucrose, dextrose, citric acid, salt, sodium citrate, monopotassium phosphate, natural flavor, modified food starch, calcium silicate, yellow 6

Fortunately it does not have high fructose corn syrup as most cheap drinks do. It does not contain magnesium and I could do without the artificial color.

Last year I decided to try Cliff Shot Electrolyte. This sells for about $18 on Amazon for 2 lbs, so $9 per pound. I got the cran-razz and found it to be the tastiest of the drink mixes I evaluated. The Cliff product labels itself as organic. The Cliff Shot ingredients include:

organic brown rice syrup, organic dried cane syrup, citric acid, salt, natural flavors, beet powder, dipotassium phosphate, dicalcium phosphate, magnesium oxide and green tea extract.

The last mix I tried was Scratch Labs. This is a local company and the ingredients are all natural, so I thought I'd give it a chance. At $19 per pound it's by far the most expensive mix around. It's not as sweet as the others but of course sweetness can be controlled by just adding more mix. The orange flavor was decent. The ingredients include:

sucrose, glucose, sodium citrate, citric acid, oranges, magnesium citrate, calcium citrate, potassium citrate, and ascorbic acid.

Interestingly, the main ingredients in both Gatorade and Skratch Labs are essentially the same (Dextrose is Glucose according to Wikipedia). I suppose I could add magnesium citrate to gatorade and get any missing benefits. Oddly enough this ingredient is best known as a laxative

In conclusion, I didn't feel like a performed any better with the more expensive drinks, so I'll be sticking with Gatorade for the near future and saving money.

In preparation for a ride I usually drink about 16-24 ounces about 30 minutes prior to a ride. Then I bring another 8 ounces or so in a water bottle, in a concentrated form. Then I put water in my Camelback. For long rides I'll put Gatorade in the Camelback but it's a pain since if any sugar is not rinsed out it starts to grow mold.

Strava GPX import from MyTracks

Occaisionally Strava crashes and loses data for a ride, so as a backup I typically record with both MyTracks and Strava. To import into Strava you just make an export of MyTracks as GPX. The default export to drive uses the KML format, but Strava needs GPX. So, to get GPX you must choose the export to external storage to get the file type option. Then you can email to yourself. Then just upload the GPX file to Strava at http://app.strava.com/upload/select_new

Saturday, May 18, 2013

Sole Footbeds

I bought a pair of Sole footbeds last summer after I got painful plantar fasciitis, which lasted about a week and best I can tell was from excessive calf raises (one of my other experiments). I choose the Sole over Superfeet since they can be heat molded to your foot. Sole has a satisfaction guarantee too which is nice. Not sure about Superfeet. The shop where I bought them cut them to for my Sidis and put them in the oven for molding, all at no charge. They screwed them up several times, first cutting them too short, then too long, so they rippled in the shoe. But two pairs later they finally got them right, sort of. The footbeds reduce the volume in the shoe and in my case I almost needed to move up a shoe size. Lately, the left footbed is pushing hard on my arch, such that is uncomfortable. I examined both footbeds and the left has a higher arch. I have no idea why it's just a problem now. Anyway I'm going to try to reheat them (200F for 2 minutes) and get the arch lower. If not I'll try the Superfeet.

Sunday, May 12, 2013

Rival Compact Crankset

The road bike I bought used a few years ago came with a 53/39 Rival crankset and a 11-26T cassette. I never had the engine to get up some of the steeper grades (up to 16%) in the front range effectively with this setup. I was always looking to shift into a lower gear. The 53/39 Rival is 130 BCD, so you can't simply put smaller rings on them. I found a compact Rival on ebay for only $85, essentially new. The compact is 50/34T, so it changes the max low gear quite a bit. Previously my low gear ratio was 39/26, or 1.5 and now it's 1.3, so a 13% improvement. I could go up to 28T cassette to reduce the ratio by 7%. That's the maximum cog a short cage will accomodate. A medium cage supports a 32 cog, but that would be a bit ridiculous on a road bike. Now I can get up the steep grades much better and I don't lose too much on the top end.





Saturday, May 11, 2013

Cleat Woes

I never pay much attention to my cleats. I always carry a few spare bolts since the time I lost a bolt on a ride and the cleat wouldn't disengage. Recently I started to feel soreness in my left foot and decided to experiment with moving the cleat position. I look at the cleats and realized the cleat bolts appear to be rounded out.



I spends the next 10 minutes digging out sand mud and whatever else out of the bolts. I try to loosen it and the hex key slips. Now I'm starting to sweat, imaging having to drill the bolts out of my Sidis. I sprayed some silicone on the bolts and things got better from here on. The bolts were very tight, at the verge of rounding out, but eventually they gave way. No surprise that they were completely rusted.



I decided this was a good time for new cleats an bolts. I had new Candy and Eggbeater cleats from previous purchases. The Candy cleat is a bit beefier and is what I ride on most so opted to install those.

Candy cleat left, Eggbeater right

I installed the dotted cleat goes on the right shoe for the 15 degree disengagement. About 6 years ago I spent a few hours riding in Moab and falling on my side until it was black and blue as I couldn't get out of the pedals. I later realized the cleats were on the 20 degree setting and my ankles don't like to twist that much.

Oh yeah, and I greased the bolts this time per the instructions. I didn't have a torque wrench that goes as low as 5 NM so I had to guess on tightness.

Update Second ride and both cleats almost came off near the end of a ride. Perhaps a torque wrench is what's need but in lieu of not having one I'm going to try anti-seize on the threads instead of grease. I miss my rusted bolts already.

PowerLink Hell

I love the idea of the SRAM PowerLink but I find removing them to be a nightmare. I've talked to other riders who say the same. I refuse to drop $15 on the park tool, so I started to think about techniques to remove the link. First I started with a wire hangar. This worked once or twice but the last time it just kept bending the wire and the link wouldn't budge. Some time later when replacing my shifter cables, I found myself staring at the old cable. I started to think the cable might work. I threaded it through the PowerLink and pulled the cable ends tight and the PowerLink popped right off. The last time I removed the chain it was a bit more difficult -- it took two vice grips to pop the link. Perhaps there is a better method but this works for now and I'm $15 richer.


Thursday, May 9, 2013

Deore XT Hubs are the Redheaded Stepchild of the XT line

For the most part I prefer most SRAM over Shimano. The exceptions being XT cranks and brakes, which I consider top notch. The hubs however are a different story. I'm referring to the M756 model. They don't live up to the quality of the XT line. The hubs are on the hefty side at 411g (rear), 302g (front). They have a steel cassette instead of alloy and they are cup and cone instead of cartridge bearings. I've found that many wheel lovers will contend that cup and cone are superior in many ways, when properly adjusted, but I find them to be an complete headache to adjust, although I didn't spring for a park axle vise which would simplify the job. The last thing missing from the XT hub is a quality pawl system (e.g. DT Swiss' star ratchet). So if you've selected an XT groupo for your new build, skip the hubs.


Monday, May 6, 2013

Creatine and Cramps

I started taking creatine a few months ago as an experiment. It's listed as a safe supplement so I felt ok trying it out. A week or so afterwards I got some bad cramps about an hour into rides. First my quads, then my calfs, and even my triceps. I rarely ever get cramps too. I didn't make the connection immediately and dismissed it as early season riding. BTW, I always have a sports drink before my ride to hydrate and get then necessary salts to prevent cramping. Later on I did a search on creatine and cramps and found there's quite a bit of evidence that they are related. In any case I'm going to stop using it to see what happens. I didn't see much of a benefit to it with weightlifting anyway. Lots of links on the matter here.

Update (6/20): It's been over a month since I stopped taking creatine and I can say 100% it was the cause of the cramps. I did get a few cramps about a week or 2 after I stopped but it takes a few weeks for creatine to leave the body so this is expected. Since then no cramps and I've ridden much farther and haven't changed anything else.


Sunday, April 28, 2013

The Chain Lube Dilemma

Update: Finish Line Wet for the MTB all the time. It's super durable and yeah it picks up dirt but it doesn't wear off like on a ride like some weaker lubes. Wipe it clean with a rag after every ride and reapply. Finish Line Dry for the road bike.

I've starting to revaluate my chain lube options. I've been using white lightening for the past several years, but being a waxed based lube, it needs to be reapplied per ride, and sometimes it doesn't even last a single ride. It also needs some time to dry, which can be inconvenient. The best thing about wax lubes is they keep your chain relatively clean, and being in a high desert climate, I don't need to worry much about water and mud.

The reason I'm looking at ditching wax lubes is drivetrain protection and endurance rides. The wax simply can't protect the drivetrain against wear as well as an oil. This is the result of about 1000 miles of mountain riding on an XT crank [note to self post photo]. And these chainrings are expensive to replace. The cassette faired better, but adding up the cost of chainrings, cassette and chain, reducing wear is going to save some bucks. Some people seem to swear by Phil Wood Tenacious Oil. The consensus from these reviews are, yeah it's protects drivetrain but picks up dirt and requires periodic cleanings.

The white lightening I use (clean ride), doesn't last an entire ride. I usually ride 2.5 hours and the drivetrain starts to hiss around 2 hours. There's no chance I'm going to stop and reapply more during a ride. Besides, it requires dry time, so this is just not practical. White lightening makes a a heavier wax lube called "epic", so I may try that. I have a 50 mile race later this year and I want to make sure I find good lube for this race.

There seems to be basically 2 types of lube: wax/Teflon and oil. In general, the trade off is self-cleaning with frequent application (wax/Teflon), vs long lasting/drivetrain protection, but requires cleaning (oil). I'd guess Teflon is similar to wax, but I couldn't find much on Teflon. The highly revered Sheldon Brown has a lot of good things to say about this subject here. Interestingly, he points out that oil, which attracts dirt and grit, can actually accelerate drivetrain wear. I guess the key with oil is frequent cleanings, ugh.

As for the different types of lubes available, here's what I'm finding:

Wax: White Lightening Clean Ride, Pedros Ice Wax (1 hour dry time, what?)

Teflon: Finish Line DRY Teflon

Oil: Pedros Syn Lube,  Finish Line Wet, and many others. Chain-L looks interesting. They have a free offer, however there are about 25 bike shops and Boulder and none carry it. RockNRoll lube sounds the most like an infomerical. I read their web page and learned nothing about their product, except that it's the best on the planet, which makes a lot of sense.

Finish line has a nice chart of different lube types and the tradeoffs

Pinbike talks about the different lube types here, but doesn't mention and brands.

Interestingly, according to Finish Line, you can't mix wax and oil based lubes.

After all this reading I'm still unsure of what to use. I'm torn between drivetrain wear and low maintenance. I will probably continue using clean ride with my road bike.

Tuesday, April 23, 2013

Giving up on GXP Bottom Brackets and Truvativ Cranks

Update: I don't like anything SRAM, except maybe the SID Fork. The XT line is just superior in my opinion.

In general I prefer SRAM over Shimano. I think SRAM offers superior quality for the price point, especially with X9, although I opted for a XO rear derailleur. Of course SRAM is not completely homegrown; they're an amalgamation of Truvativ, Avid and RockShox. The one component that lets me down consistently is the GXP bottom bracket. I've gone through 3 so far. The bearings get scratchy after a few hundred miles. BTW, this is the standard BB, not the ceramic. I'm now using Shimano XT BB and cranks and they have been excellent so far (~1000 miles). Additionally I think the Hollowtech design is superior. The other Shimano component I prefer over SRAM is the XT brakes, although I made the mistake of buying Avid CRs.

Sunday, March 10, 2013

Colorado XC MTB Races


I've been thinking of doing a cross-country race for some time and I think this may be the year to get started. Here's a list of Colorado races I've been compiling. I've included a range of shorter races (Winterpark) to longer endurance races (50 miles - 100K) and unsupported races. For each race I'd like to include an indicator of the difficulty, based on elevation gain. Elevation gain however can be misleading without knowledge of the terrain and it seems some races don't list elevation profiles. Some races are missing some details due to lack of information, or laziness.

Gunnison Growler
  • 5/25 Half 77 32 miles
  • 5/26  $97 for the Full-Growler 64 miles 8000 feet

Winterpark Epic Series Race 2 ($40 for registration prior to race day): Saturday, June 29 - Super Loop 

Winterpark Epic Series Race 3: Saturday, July 13 - Point to Point

Leadville Silver Rush 50, July 13, 2013, $115, (Registration open as of 3/1/13)

Laramie Enduro July 24, 2013, 70+ miles, 8600 climbing, 

Winterpark Epic Series Race 4: Saturday, July 27 - Colorado Epic XC

Winterpark Epic Series Race 5: Saturday, August 10 -Race Rendezvous

Breck Epic (3 and 6 day) Aug 16, 2013

Steamboat Stinger - 50 miles, Aug 17, 2013 ~6600 climbing - $75 (Registration open 3/1/13)

Winterpark Epic Series Race 6: Sunday, August 24 - King of the Rockies 

Winterpark Epic Series Epic 50 September 7th (registration starts 4/1, 400 entrants)

CO Endurance Series (Self Supported) http://coloradoes.wordpress.com/

Firecracker 50 - No details as of 3/8/13