FattyStripper review

So reading a forum recently, I got wind of a new product to help with tubeless set-up called FattyStripper. (Sounds like one of “those” websites, I know, but rest assured it’s perfectly wholesome.) It’s basically a giant latex rubber band that you stretch around your rim before you mount the tire. Combined with a separate tubeless valve, it’s pretty similar to the “ghetto” tubeless method that I’ve tried before using old innertubes, except a lot lighter — 50 grams before trimming. The band is wide enough for any fat rim up to 100mm.  A picture is worth a thousand words so here is the first of many:


Yep, that picture is for real: I got the tire bead to seal using a floor pump, on the first try. A bit of dish soap applied to the bead before pumping caused the tire to slide right onto the bead shelf. Granted, it’s a high-volume pump made for fat tires but I don’t think that would have mattered. And it showed no noticeable loss of pressure in the course of about 2 hours. This is a Surly Rabbit Hole, and Surly rims are a real bitch to set up tubeless, but on the other hand, Bontrager tires are the bomb when it comes to tubeless setup (I run their Barbegozzi tire on their Jackalope rim on my fat bike, with nothing but a single wrap of tape over the spoke holes, and they hold air for days without sealant). So I feel like the FattyStripper makes up for the poor tubeless characteristics of the Rabbit Hole.

Now Jim@FattyStripper recommends gluing the band to the rim before mounting the tire, but I didn’t want to do that until I was sure I liked the product. But after setup, I didn’t really feel like taking it all apart, and I kind of liked the way it looked with the strip hanging out, so I hit upon this brilliant idea: why not glue the strip to the outside of the rim? I headed down to Home Depot and bought some painter masking tape/plastic. This stuff is the easiest way to mask something — the tape is already pre-applied to the plastic and it comes off the roll ready to apply.

The roll is tiny but the plastic is folded up, so that when you unfold it, it’s 24″ wide. This is great because there’s no chance of getting any of the spray glue on your disc rotor.


Now I just put a nitrile glove on one hand, and went around the rim pulling up the strip while spraying glue under it. I erred on the low side since I didn’t care how much glue I got on the plastic mask, and I didn’t know what it would do to the tire sidewall. Jim recommends Elmer’s mutli-purpose spray adhesive, but I couldn’t find that locally, so I used 3M Super 77.

Here’s the result after trimming. I think it looks amazing.


Thumbs up for FattyStripper!

Now for the stuff that didn’t quite work out. Along with the FS I purchased their 3M Bling Strips to cover the rim cutouts. Unfortunately, I can’t recommend these with the Rabbit Hole or any rim like it. Although they may work fine for double-walled rims with recessed spoke nipples, the Rabbit Hole is a single-wall design with nipples that sit up above the inside of the rim, and they are offset to one side. As a result, the Bling Strip, which doesn’t have any elasticity whatsoever, does not lie flat and puckers horribly when pressure is applied. Too bad, because they look great when mounted properly.

I went back to the Surly rubber rim strip designed for this rim. However, then I got another rude surprise, which was that when you air up the tire, the strip bulges ridiculously out of the cutouts. I think this is because the strip does not provide enough support without the (heavy) Surly innertube. I solved this problem by running a single layer of Orange Seal 45mm tubeless tape around the rim before mounting the FattyStripper. The OS tape is extremely thin, has no stretch, and weighs nothing. And it’s just a tiny bit wider than the rim strip (45 vs 38mm) so it overlaps just a bit on each side. I would really like to switch to a solid rim but it is hard to find one that has offset spoke holes like the Rabbit Hole. I’m a big guy (over 200lbs) and I like the extra strength provided by offset lacing. I would love to use the Bontrager LinePlus rims, but they are only available in 28h at the moment and I’m not comfortable with that either.

Week 10

Last week I rode another 50km but 1400m of climbing! Thanks to a ride to Gold Hill, which is at elevation ~8000 (feet, not meters!).

About a week ago, my chain started rubbing on my tire and I didn’t know why. It happened after the bike fell over on its side; I assumed maybe my sliding dropouts got out of adjustment? But they seemed ok. Well yesterday morning before my ride I decided to get to the bottom of it. I put the bike on the stand, shifted to gear 1, and pedaled, and I could hear the chain rubbing, but it looked like there was plenty of clearance. After about 10 minutes of head-scratching, I realized the lower part of the chain was rubbing on the tire. Now it all made sense — when the bike fell over I probably bent the derailleur hanger.

Fortunately, last black Friday I stocked up on tools. One of those tools was the Park DAG-1, which is used to align the derailleur hanger. It seemed a little extravagant to purchase a single-purpose tool like that, but reviewers all said that it was a great thing to have, that they found nearly every one of their bikes was out of alignment in some way, and that the tool made them all shift better. Sure enough, the hanger was bent downward, causing the tension pulley of the derailleur to be too far inboard and causing the lower half of the chain to rub on the tire. One tweak and the problem almost went away. Under hard pedaling I can still hear it, but I didn’t want to overdo it the first time. I’ll revisit this later.

Week 8

Thanks to unusually warm and dry February weather here in Colorado, I was able to get out twice this week, for a total of 92 km, 1662m. I was really bonking at the end of today’s ride, so I am looking into Hammer Nutrition products.

Week 7

Well, last week (week 6) was pretty much a bust. We had about 16″ of wet snow on Tuesday 2/2, which you can’t ride through even on a fatbike. But I was psyched for the weekend, when the trails at Brainerd Lake would be packed down. Unfortunately, when the weekend arrived the wind forecast for that area was 40mph — not uncommon at 10,000 feet in Colorado! But the weather was really warm on Sunday, so I drove down to the Marshall Mesa trailhead south of Boulder to do some fatbiking. Big mistake — Up at Brainard, the trails are beautifully smooth because the only feasible way to use those trails is on snowshoes or skis. But down at the elevation of Boulder, people hike the snowy trails without any equipment, although there was still snow, it was so full of hiker footprints that it was miserable riding.

Anyway, the weather warmed up a lot and I did manage to get out two more times, including today. I did some easy rides straight up Four Mile canyon, because I figured the road would be a lot drier than the typical canyon-wall-type rides that I like. Wrong! Coated in mud every ride. Still, I managed a total of 48km this week, and 883m of climbing.

Early season training

As promised, I’m going to keep a log of my training this spring here, for the benefit of both:-) of my loyal readers.

Last week (fifth week of the year, Sunday – Saturday) I managed to pedal 34km. That may not sound like much, but (a) it’s January, (b) I’m trying not to ride pavement, and (c) that includes 1300m of climbing! Work it out, that’s better than a 7% average grade.

Fortunately it’s been unseasonably warm and dry for a few weeks, so a lot of the dirt roads around here are rideable. There are still patches of ice and mud on north-facing sections, which really slows things down. And I have to hose off the bike after every ride.

However, it is starting to snow even as I write this, and by the time it’s over 36 hours from now we’re supposedly going to have 16 inches on the ground. Guess I’ll be fatbiking this week!

In other developments: I did purchase a shorter stem for the Gnarvester, but when I went to install it I noticed that the faceplate wasn’t tightening down evenly. I took out my ridiculously accurate digital calipers and found that the center bulge in the handlebar was not uniform — it was about 31.8 on one side and 32 and a few tenths (don’t remember exactly) on the other side. At first I thought “manufacturing defect that I never noticed until now”, but then I remembered a crash I had in early 2015 that slammed that end of the handlebar against the gound hard, and I think perhaps that deformed the bar. Now the bar is titanium, so I’m sure it’s safe to use, but cracking the stem clamp is what I’m worried about. So… time for a new bar too.

First training ride of the season

Well, it got up to about 60 degrees today — January in Colorado! — so I couldn’t quite make myself drive to higher elevation and freeze my ass off snow-biking. Instead, I took out the Gnarvester, the bike I am going to ride in the Alberta Rockies 700 this summer.


14.5 miles at an average pace of 8.5mph; I was slowed down not just by the climbing (1870 feet) but also by the fact that some of the roads were muddy and/or icy. The Boulder Creek Path in Boulder Canyon was especially treacherous.

Today’s ride made me realize two things: first, I have to convert to metric. The entire ride I found myself mentally converting my ride stats to km ridden, meters climbed, etc. Not only do I not want to be doing that all spring, but when I actually get to Alberta, and all the road signs are metric, I don’t want to constantly have be thinking, “ok, it’s 30km to the next water stop, let’s see that’s about 19 miles so it should take me 2 hours”. Especially not when I’m too tired to think! I want to think “fluently” in metric. So I’m going to pull the battery out of my Rox 8 and reboot in metric mode, and from now on, all the ride stats posted here will be metric.

Second, I have to get a shorter stem. My bike position is great for cranking along on a flat smooth road, but it sucks for climbing, and the AR700 is all about climbing.

On a related note, today I weighed my bikes. I’ve been trying to decide whether I wanted to take my 29+ Gnarvester or my Twenty2 Cycles fatbike on this ride. I think the fatbike is overkill, but I thought if the weights were close, it might be worth it for the comfort. I bought this scale on Amazon the other day and it arrived yesterday. The weights: 29.2 lbs for the Gnarvester, 33.2 lbs for the Twenty2. Advantage: Gnarvester. The only downside to the Gnarvester is that, with its 1×11 SRAM drivetrain, it doesn’t have as low a low nor as high a high as the Twenty2’s Rohloff. However, I think the 4 lb weight advantage ought to help on the climbs, and the reduced rolling resistance should help everywhere else.

Alberta here I come!

Ok, after much hemming and hawing (and cross-checking vacation schedules with the ex-wife), I’ve decided I’m definitely doing the inaugural Albert Rockies 700 this summer.

Now to get in shape! The ride is 690km with about 9km of climbing. For the metrically-challenged, this is 425 miles and about 30k feet of climbing! So even at the relatively slow (and certainly non-contending for any podium position:-) ) pace of 7 days, that’s 62 miles and 4400 feet of climbing per day. To do it in 6 days, it’s about 74 miles and 5000 feet of climbing per day. And I can’t conceive of doing it any faster than that.

One mitigating factor is that there is oodles of daylight up there at that time of year. According to sunrisesunset.com, sunrise will be about 5:30am and sunset about 10:30pm; and there is enough twilight to carry on outdoor activities without artificial illumination for about 45 minutes before and after those times. (In fact, the sky never goes totally dark at that latitude in midsummer.) So it is no problem finding enough hours in the day to ride the miles; it’s an issue of finding enough miles in the legs!

Since I live in the foothills of Colorado (just west of Boulder), there is no shortage around here of either dirt roads or climbs. However I don’t think that weekend-only riding is going to get me ready for sustained, day-after-day effort. Luckily (funny, this never seemed luck before), I work about 20 miles from my house and I can commute mainly on low-traffic roads and trails. So my plan is, starting about May 1, I will commute to work on my Carver Gnarvester (the bike I’m planning to take on the ride) as many days a week as I can stand. (I can’t start before May because there aren’t enough hours of daylight and it’s pretty scary riding the canyon where I live in the dark.) Since I have child custody every other week, this will be a one-week-on, one-week-off sort of thing. In the final week of training, I plan to do the commute with my full gear kit.

In addition, I’ll have to do an occasional weekend ride to train for distance. But the multi-day commute is to condition me to getting up every morning and riding no matter how tired I am from the preceding day(s).

I plan to post my training rides here as I do them, and then I’ll update from the trail to see if the training prepared me adequately. Hopefully, this might give other people, who are considering taking on a multi-day bikepacking route but are wondering if they are in shape to do it, an idea of how much training is enough, and whether it’s possible to do enough training while holding down a job and taking care of kids!