Recent content by SimonG

70-80 rpm. I’m using the center gears most and am hitting 49kph on flat flat fire roads.

Yeah im sticking with the SRAM 11-50, I find 10 is too fond of slipping when biking in New Zealand. I was out this morning; it's fast... obliterated trail times....Strava would not validate my time and sent me a message about a suspected vehicle.

You are correct, i confuddled radius with diameter. The ring sits 4mm lower.

Don’t know in the diameter difference on steel vs alloy….. the steel ring is 4mm thick, I have a 36t alloy and it has a 5mm spine at its widest but the steel is really hard, obviously.

For other who read this….. the above poster is a know all-know f all troll with an opinion. Despite repeated requests for material fail calculations I have received nothing. The shop I used did the engineering calculations and do work for aerospace industry. It’s sound.

Been out twice, working as it should. it sits 2mm lower than a 36, so not worth worrying about, the chain line is +2mm. No noises or gear change drama. I’ll see how it goes.

I used a sram 38t it snagged.

It will fit but …….Battery management system (BMS) changes: The EP801 introduces “revised electronics … update in the battery management systems”. That implies that the previous generation battery’s BMS may not interface properly (communication protocol, CAN‐bus, etc). Sell the bike to cash out...

Hi, I had a gem 2 & 3 Levo and a trek rail 9.8xt currently on an Amflow which is a clone of the gen 2 geometry. The marketing bs and reviews suggest the Levo, it’s a great bike but the rail imo is better. The Levo electronics are delicate and the Rosenberg plug glitched on both of mine. The Levo...

I had another no nothing with an opinion the other day. Show me your maths on bearing load/material fail. Mine says it won’t fail and been out 2 hour this afternoon and had no issues. Gonna run the figures past material strength experts for validation then flog the solution on eBay for £149 a pop. 💰

Because I’m a food technologist, built a company and employ engineers but I haven’t a clue how to work a phone forum thing.

Went to cnc machine shop and got 1mm milled out of the Amflow spider and SRAM 38t steel chainring. Also added a spacer to recenter the chain guide. It’s perfect.

Well now…. I assumed a force at BCD of 200NM and used force formulae to calculate 1.7mm. This reduces the bending strength by 71% but it’s the sheer force in this application that matters, this force reduces by 34%. I don’t really have time for no nothings with opinions, show me the calculations...

I bought a 2nd amflow spider. I’m popping down to a local engineering shop and getting 1.7 mm of material removed from the spider arms to increase the distance from the suspension arm.

Get a knox action shirt Men’s Action Pro Shirt - Knox I have had loads of armour over the years, this is for road motorbikes but its the best and most comfortable. Im in uk so a bit hot on sunny days but otherwise brilliant. If you want chest armour check out the fox titan range.