It kinda is my job right now, since we’re designing the Jackalope V2 and I need a lot of test miles on V1 for data.
Jackalope V1, yesterday morning
I’ve now put over 350 miles on Jackie the Jackalope (V1). Averaging my miles-per-hour over the 5 longer (30-100 mile) rides on her so far, I get 12.96mph.
Easy Racers Ti-Rush, this morning
For comparison, I rode my fastest bike, Titania the Ti Rush, 64 miles today at an overall 15mph. Over my last 5 rides on Titania my average was 14.74mph.
Dividing 12.96 by 14.74 we get 0.87924016.
Thus, the Jackalope V1 is about 88% as efficient as the Ti Rush.
I’ve been disappointed in the Jackalope’s lower speeds but really this isn’t terrible. V1 is massively overbuilt and heavy, at least as heavy as my steel Tour Easy. She has a Rohloff Speed Hub internal gear system, which is heavier and less efficient than a traditional rear derailleur. The hinge and elastomer surely reduce efficiency a bit. It’s also possible that the Calfee Stiletto geometry on which she’s based is inherently less efficient than the Easy Racers Ti Rush.
Calfee Stiletto, a few days ago
In fact I just checked my Stiletto’s average MPH over 7 rides: it’s 13.53, against which V1 compares pretty well, at about 96% efficient. That’s actually better than the efficiency penalty of the Rohloff hub alone, estimated at 94.5%.
Maybe we should ditch the Stiletto geometry entirely and go back to the ol’ drawing board, and base V2 on Easy Racers geometry – or the Carver Ti-Glide. Hmm…
Remember back in March I decided to make my dream bike a reality? On September 22 the prototype arrived:
1. The Jackalope2. The Jackalope quick-folded3. The Jackalope folded with seat removed
Look at that fold! Look at that double belt drive with jack shaft! She has a Rohloff internal hub, a no-longer-made RANS seat, and is made of titanium.
Thus far I’ve put 220 miles on her, including a full century yesterday. I have so much to say about this project I don’t know where to begin. Builder Davis Carver and I are already designing a Version 2 optimized for lightness and speed, because this one is heavy and “built like a tank.” Very comfortable though.
THE PLANS! Build your own! Share the results.
Carver says the plans are not proprietary, so anyone who wants to iterate on this is more than welcome! Improve it please, and share your changes!
The Jackalope’s original 175mm crank arms were way too long and interfered with the front wheel. So I found 160mm replacements which Sam the Mechanic swapped out for me. V2 will move the fork forward so this doesn’t happen again, although short crank arms are pretty sweet.The jack shaft! Only wearing one belt here because the cap wasn’t fully tightened and it fell apart while I was testing. Whoops! So much to learn when getting to know a one-of-a-kind prototype. I put it all back together with Carver’s instructions, and later Sam tightened it down harder than I could.The Jackalope originally came with a AD Carson seat, which was way too big for me. I replaced it with a RANS seat. Unfortunately RANS is no longer in business and such seats can only be found on used bikes, but not all can accommodate the clamp system on this bike.I replaced the bolts that attach the seat struts to the support bars with thumb screws and wingnuts, so I can remove the seat after folding without tool. The round part of the plate in the middle is where the elastomer on the rear triangle hits.
Here are my sketches from March that started this off:
I hope to make some sort of crowdfunder to finance the next version, but I’m gonna get-r-done come hell or high water, because my Muse says so. I’ve been wondering why I haven’t been moved to make another movie or quilts or any much visual art lately. Now I know: She’s been saving me for this bike.
Transcribed (and edited) from a voice memo I recorded on a ride September 22 2026.
Light shines between two hemispheres of my brain. Or 2 cornfields; I’m so absorbed in metaphor it’s hard to tell.
I am riding east to say goodbye to the Summer sunrise.
The sun will rise regardless. The sun does not need me, but I find it meaningful to say hello and goodbye. That’s because I’m anthropomorphizing the sun, because I am a human being and that’s what human beings do. We’re anthropomorphizers.
Cats think we’re cats; we think the sun to some extent is a person. Also we think cats are people. We think it’s funny that our cats do it too – they felinomorphize us as we anthropomorphize them.
God is anthropomorphized Reality.
Reality exists whether I believe in it or not. But attributing character to this incomprehensible abstraction is the only way I can have what’s called a “spiritual connection.” I could keep Reality remote and abstract and not have that connection. But the human brain is set up for human relationships, and if I close that door I’m closing my mind.
If Robin Dunbar is to be believed, most of the human brain is devoted to navigating complex relationships with other humans. I might as well allow that architecture to help me navigate the rest of the world too. Instead of fighting my human nature, I can just let my anthropomorphizing brain do its thing.
Humans are optimized for religion. Whether we’re aware of it or not, we think religiously.
Most people who use the word God probably do not conceive of God the way I do. Others hate the G-word and the whole anthropomorphic project. If I say “God wants ____” I just imagine all the atheists inside of my head rolling their eyes saying, “Nina’s in a cult!”
But I need to refer to Reality as something with agency and pronouns. “God” is a convenient shorthand for otherwise over-wordy concepts. It’s also a way to access human culture, accumulated millennia of religious thought. Increasingly, it is the most honest way for me to speak of my own experience.
I still feel a need to distinguish myself from those that use the G-word as though they are talking about a Man In The Sky. I am not talking about a Man In The Sky. But it sounds like I’m talking about a Man In The Sky because I necessarily have to anthropomorphize.
Speaking of things in the sky, I can see traces of sunrise ahead of me. The sun is not up yet but will be soon. And when it rises — if I can see it through all these clouds, there’s just a little tiny crack of light behind them — it will be Due East, where this road hits the horizon. Because today is the equinox. I will say goodbye to my beloved Summer Sun, and hello to the Winter Sun, with whom I have a somewhat different relationship. A relationship I can only understand in anthropomorphic terms, because God made me that way.
Further to this Handy Guide to Sin and Guilt Offerings, I asked Grok to generate this table of Old testament sins and their corresponding punishments. Now you know what to do! You’re welcome.
These practices are detestable; the nations are driven out because of them. (Death penalty is applied to practitioners in related texts such as Lev 20:27)
Investigate thoroughly; if true, destroy the town and its people and livestock by the sword; burn the town as a whole burnt offering; leave it a permanent ruin
Ever wonder what ruminant/bird you need to sacrifice for your sins and impurities? Well wonder no more. This handy table makes it easy to atone!
I asked SuperGrok (an AI chatbot) to make me a table of all the sins/impurities in the Old Testament requiring a sacrificial offering. Here’s what it produced. You’re welcome.
Sin/Guilt (or related impurity requiring compensatory offering)
Standard Offering
Discounted Offering (if available)
Unintentional sin by the anointed (high) priest (brings guilt on the people; Lev 4:3–12)
Young bull without defect (sin offering)
None specified
Unintentional sin by the whole Israelite community/congregation (Lev 4:13–21)
Unintentional sin by a common person (doing what is forbidden in the Lord’s commands; Lev 4:27–35)
Female goat without defect, or female lamb without defect (sin offering)
(See graduated options under specific cases in Lev 5; not universally restated)
Failing to testify / withhold evidence when one has heard a public charge (Lev 5:1)
Female lamb or goat from the flock (sin offering), after confession
Two doves or two young pigeons (one sin offering + one burnt); or, if still unable, 1/10 ephah finest flour (no oil/incense) as sin offering
Unwittingly touching ceremonially unclean things (e.g., carcass of unclean animal or creature) and later realizing guilt (Lev 5:2)
Female lamb or goat (sin offering), after confession
Two doves/pigeons (one sin + one burnt); or 1/10 ephah finest flour (sin offering)
Touching human uncleanness of any kind that makes one unclean, even if initially unaware, then realizing guilt (Lev 5:3)
Female lamb or goat (sin offering), after confession
Two doves/pigeons (one sin + one burnt); or 1/10 ephah finest flour (sin offering)
Thoughtlessly / rashly taking an oath (to do good or evil) and later realizing guilt (Lev 5:4)
Female lamb or goat (sin offering), after confession
Two doves/pigeons (one sin + one burnt); or 1/10 ephah finest flour (sin offering)
Unfaithfulness by unintentional sin regarding the Lord’s holy things (Lev 5:14–16)
Ram without defect from the flock (guilt offering, of proper value) + full restitution + additional 1/5 to the priest
None specified
Sin by doing what is forbidden in any of the Lord’s commands, even without knowing it at the time, then realizing guilt (Lev 5:17–19)
Ram without defect (or its equivalent/value) as guilt offering
None specified
Sins against a neighbor (deceiving about something entrusted/stolen, cheating, finding lost property and lying about it, swearing falsely about such matters; Lev 6:1–7)
Full restitution + additional 1/5 to the owner + ram without defect (of proper value) as guilt offering
None specified
General unfaithfulness / wrong against another (with no surviving kinsman to receive restitution; Num 5:5–8)
Confession + full restitution + 1/5 (to the priest if no kin) + guilt offering
None specified
Sexual relations with a betrothed slave woman (Lev 19:20–22)
Ram as guilt offering (after investigation; she is not put to death)
None specified
Unintentional sin by the whole community (failing to observe commandments; Num 15:22–26)
One young bull as burnt offering (with grain and drink offerings) + one male goat as sin/purification offering
After childbirth (purification from flow of blood; Lev 12:6–8)
Year-old lamb (burnt offering) + young pigeon or dove (sin offering)
Two doves or two young pigeons (one burnt + one sin)
Cleansing from a defiling skin disease (after initial rites and waiting period; Lev 14)
Two male lambs + one ewe lamb + finest flour mixed with oil + oil (includes guilt offering of one lamb with blood/oil application to ear/thumb/toe, plus sin and burnt offerings)
One male lamb (guilt offering) + 1/10 ephah finest flour mixed with oil + log of oil + two doves or two young pigeons (one sin + one burnt), “such as they can afford”
Male or female with certain abnormal bodily discharges (after waiting/washing period; Lev 15:13–15, 28–30)
Two doves or two young pigeons (one sin offering + one burnt offering)
None further reduced (birds are the prescribed standard)
Nazirite defiled by contact with a dead body (Num 6:9–12)
Two turtledoves or two young pigeons (one sin + one burnt) on the 8th day; then a male lamb as guilt offering (and restart the vow period)