Tire Speed

Tire Speed and Weight (Updated January 2022)

With the tires I have laying around, and a some new ones I decided to figure out which tire combination is the fasted. Over the course of a few rides I came up with the results. 

No science involved here, just going downhill and keeping track of the downhill speeds when weather and road conditions seemed to be about same for each ride I measured. 

Max speed measured on ICE Sprint FS E8000 with max pressure in tires, no breeze and Panniers. Fastest and slowest speed have been eliminated. 

It seems like the Schwalbe Marathon Supreme 42/559 (26 x 1.60) on the rear makes the difference between fast and not so fast. It's too bad Schwalbe no longer makes a 406 (20") tire. The Supreme is an expensive tire but I feel it is one of their best tires.

Note; I posted on this subject back in January and July. This post is inclusive of those two posts.The last tire addition is a Schwalbe Big Ben 55/559 at the bottom of the list.

Note; I currently use the standard mesh seat
not the Ergo-Luxe you see in the picture.

Front tires and Back Tire

Schwalbe 406 Marathon Green Guard  and  Schwalbe 559 Marathon Supreme

40/406 - 530g   1.16 lbs

40/406 - 530g   1.16 lbs

42/559 - 440g   0.93 lbs

Total    1,500g  3.25lbs

Speed Average: 38.8

Speeds: 38.9, 38.5, 40.8, 38.1, 39.9, 38.1

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Schwalbe 406 Marathon Racer  and  Schwalbe 559 Marathon Supreme

40/406 - 340g   0.75 lbs

40/406 - 340g   0.75 lbs

42/559 - 440g   0.93 lbs

Total    1,120g  2.43lbs

Speed Average: 38.6 mph

Speeds: 40.8, 38.1, 38.5, 38.5, 38.1, 39.4

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Continental 406 Contact (E25)  and  Schwalbe 559 Marathon Supreme

37/406 - 420g   0.93 lbs

37/406 - 420g   0.93 lbs

42/559 - 440g   0.97 lbs

Total     1,280g  2.83 lbs

Speed Average: 38.2 mph

Speeds: 36.5, 38.2, 39.4, 38.7, 37.8, 38.0

__________________________________

Schwalbe 406 Marathon Plus  and  Schwalbe 559 Marathon Plus

35/406 - 560g   1.23 lbs

35/406 - 560g   1.23 lbs

40/559 - 870g   1.90 lbs 

Total    1,990g  4.36 lbs

Speed Average: 36.5 mph

Speeds: 37.1, 35.8, 36.8, 36.5, 37.8

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Schwalbe 406 Marathon Green Guard  and  Schwalbe 559 Big Ben (added December 2021)

40/406 - 530g   1.16 lbs

40/406 - 530g   1.16 lbs

55/559 - 760g   1.68 lbs  (Race Guard)

Total    1,820g  4.00lbs

Speed Average: 35.5 mph

Speeds: 35.7, 35.3, 34.9, 36.0, 35.5, 35.3

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Schwalbe 406 Marathon Green Guard  and  Schwalbe 559 Marathon Green Guard 

40/406 - 530g   1.16 lbs

40/406 - 530g   1.16 lbs

47/559 - 875g   1.93 lbs

Total    1,935g  4.25lbs

Speed Average: 35.3 mph (Only one ride so far) 

Speeds: 35.3

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Shoulder Surgery

This time my left shoulder got a repair job. My right shoulder was repaired in 2008.

 October 20th

Carrie dropping me off. She can't come in because of COVID protocol.

I'm getting used to structural repairs.

(repair list here)

October 23rd

Bandage removal, nasty!

Nice to be married to a retired nurse.

Not so bad. Only five holes.

November 24th

Arthroscopic holes healed up

"Popeye" muscle after surgery on left arm.

A cosmetic deformity that can occur after a Tenodesis. The bicep tends to bunch up because the damaged section of the long head bicep tendon is cut and the shorten tendon is relocated from the Glenoid and reattaches lower down to the Humerus. 

Normal muscle right arm.

The details;

1. Rotator cuff repair

2. Bicep tenodesis (reallocation of bicep tendon)

3. Munford procedure

4. Debridement labrum

5. Decompression paralabral cyst

Where and who;

1. Southern California Orthopedic Institute (SCOI)

2. Dr. Mark Getelman

At home care provided by nurse Carrie, my beautiful wife.

Bike Index

My trike and batteries and their serial numbers are now all registered on Bike Index. It's free except for optional stickers with a unique code linked to my trike and batteries.

 

People For Bikes

People For Bikes

I recently noticed that People For Bikes inclusivity program neglected forms of cycling other than traditional bikes and abled cyclists. I brought this to their attention and I was pleasantly surprised that after only a couple of days from the time I sent a comment to them they responded to me. And it was not a simple boiler plate letter that I usually get when sending comments to organizations.

I will include People for Bikes on my list of organizations I support.

Here's their response;

______________________________________________________

Hi Mark - 

Thanks so much for your generous donation to PeopleForBikes and for taking the time to write to us about the need to include people who ride recumbents, trikes, handcycles or other types of cycles in our advocacy work.

Your comment was both timely and absolutely correct. Telling the stories of, advocating for, and sharing images of people who are disabled has been a gap for us. It is one we are working to fix. 

A few current or upcoming examples:

- PeopleForBikes hosts the Bicycle Leadership Conference for members of the bike industry every year. The virtual event in November will feature two keynote speakers who participated in this year's Paralympics in Tokyo; https://www.bicycleleadershipconference.org/

- We are publishing two blogs in October that feature these stories. One from an adaptive rider who is documenting all the trails in his hometown for how they accommodate him and others like him, and one from a Seattle planner who is disabled and speaks to her experience and the need for more people who are differently abled in the transportation field. 

- Our imagery does not reflect the diversity of people who ride cycles and we are working to change that. In the short term, we will use more stock imagery (as available), and in 2022 we will host our own photo shoots to ensure the diversity we are looking for. 

Finally, since I manage our Community Grants program, I'll add that I am seeing more proposals for infrastructure projects that accommodate handcycles and trikes. We have helped fund a few and hope to support more.

Thanks again, Mark, for reinforcing that our path is the right one and that we need to move faster. If you have specific ideas or suggestions, please don't hesitate to share.

Best,

Zoe

Di2 and Shifter Switch

After wearing out two SW-E6000 switches used for shifting my Shimano Di2 rear derailleur I decided to dump the Di2 and go back to a cable. I have barely 6,000 miles on my ICE Sprint FS E8000. There are other reasons for getting rid of the Di2 but the switch problem was the final motivating factor in making the change. The switch used for shifting gets a lot of use.

Rather than trying to figure out how to mount other types of Shimano switches I instead removed the Shimano  XT Di2 derailleur and went back to a cable actuated derailleur connected to an indexed bar end shifter.

Once again I'm enjoying the tactile experience of shifting with a cable. The Di2 is a push of a button and cluck the chain moves to another cog at a predetermined speed. The speed of the shift can be adjusted but not while riding. I like to be able to subtlety adjust the speed of a shift depending on how I'm riding. 

It's hard to avoid a loud sloppy gear change while the E8000 is in the Boost mode. The Boost mode puts a lot of pressure on the chain while climbing and you need to be really focused on pedal pressure and the timing of the gear change to avoid the awful gear crunching sound. It's difficult to truly know how much pressure you're putting on the chain while shifting in the Boost mode making it hard to "feel" the gear change using the Di2. The bar end shifter and cable allows me to adjust the timing of the shift more precisely.

Also there is peace of mind knowing that I can still shift gears if there is a complete failure of the electronics on the E8000. In addition if a cable breaks I can easily replace it while on the road. If the Di2 wire fails I'm out of luck.

It seems to me that the Di2 system works best on a bike or trike without an electric pedal assist.

SW-E6000 Switch used by ICE for the E8000 assist and for the Di2 rear derailleur.

BEFORE

Top switch used to adjust boost level,
lower switch used to change gears.

 

The before view looking into the cockpit.

Shimano Di2 XT Long Cage

AFTER

Only the boost switch now.

New view into the cockpit. Boost switch on right and a MicroShift indexed bar end shifter on the left handlebar. I prefer a Sram bar end shifter but I've only seen them sold as a pair for rear and front derailleurs. But MicroShift as upped there game since the last time I used one of their indexed bar end shifters so I'm happy with it.

New Shimano XT Long Cage cable version.

Cane

I keep a carbon fiber cane in my pannier. 

Watching the Tokyo Paralympics gave me a WTF reality check. So I need a cane to stabilize my wonky legs. So what? Is that all I have to complain about? Up until now I was embarrassed to pull the cane out of my pannier and have to use it. I don't give a shit anymore. I'm just being my best and enjoying life.  

So what gives?

I have nerve damage to my lower legs and feet caused by either years of back problems and back surgeries but more likely from bi-lateral hip replacements. The timeline suggests the butcher job the surgeon did on my hips not only caused nerve damage but also left me with a scared and chronically inflamed Piriformis muscles and sciatic nerve entanglement in the scar tissue. Also Heterotopic Ossification in my right hip (more here) and an uneven pelvis. 

Slowly over the years, after my hip replacements, my calves muscles (particularly the Gastrocnemius) have weaken to the point where I can't stand on my toes, My right leg is worse. The medial head of the  Gastrocnemius has totally atrophied. Try getting around with weak calve muscles. I feel like a drunken cow if I'm not using a cane. I would not pass a sobriety test walking a straight line. So I use a cane to stabilize my walking because my calves aren't helping much. 

When riding my trike clipping into my pedals helps to stabilize my calves but then I have to deal with lower leg numbness which starts in my feet. When I ride the more I climb and the longer I ride pressure builds on the small compromised Piriformis muscles that are adjacent to the sciatic nerve. And the lower leg numbness sets in and I have to take a short break and stretch. 

And I have some other minor nerve damage issues to my legs that are not worth complaining about. 

And to top it all off the weakness in my legs makes me prone to uncomfortable muscle tightening and occasional full blown cramps. A couple of small muscles in my right leg, the Gracilis (inner thigh) and the Tibialis (shin), are forced in some way to compensate for my wonky calves and they'll cramp if I get off the trike to fast or make sudden cycling movements after I've been riding for awhile. I just have to be aware of this and be careful. I can go for months without a cramp and then I eventually do something stupid like hurry off the trike after a long ride. 

I've kept my upper body strong so maybe time to add a handcycle to my cycling routine.

I'm done...time to look forward.

 

Why E-Assist?

This is why I have e-assist, averaging 70 feet of gain per mile last month with my dysfunctional legs. So far this year I’ve pushed pedals up 132,000 feet of hills while averaging 72 feet of gain per mile. Nothing but hills where I live in So Cal. No way I could do it without e-assist. I have my 250 watt Shimano E8000 on my ICE Sprint and it makes all the difference in the world in keeping me moving.