It would seem that the 100k record is now not possible either.
Not true.
Working backwards from the restart Steve's daily average peaks at 192.2 for the 77 days in the run up to Aug 8, it seems logical to include those days in a theoretical 100k. Taking those 77 days plus the current attempt gives an average of 191.3 over 223 days. Steve would need to average 207.7 for the rest of the rebooted attempt plus a further 57 days to take the 100K record. That's the original Tommy Godwin average plus a few minutes per day which is a whole lot more viable than the Searvogel average plus nearly an hour he needs for the year record.
Firstly, the aim of the ride was the HAM'R - 75,065 miles in 365 days. The 100k record (in 500 days) was secondary. On the first attempt, Steve managed 65,565 miles, which leaves 34,435 miles in the remaining 135 days - 255 miles a day. Not going to happen. If he really wished to run a second attempt on the 100k contemporaneously with the second HAM'R attempt (I can't see why he would, but this is Steve!!), he has 73,081 miles to
match Tommy in the remaining 353 days - 207 miles every day, as you say. It's certainly possible, but his speed needs to increase considerably above anything he's achieved so far (see several posts passim). I'm not sure if the 100k is being run under the UCMA rules, or is effectively unofficial - I haven't found any reference to it on the UCMA site. Anyway, Steve's initial target distance for HAM'R was 80,000 miles. At that pace (219mpd, which seems well beyond the possible now!)), Steve would have been aiming to break the 100k barrier in 457 days. To achieve that along with the second HAM'R attempt would now need 235.7mpd. Of course, beating it by one day would be sufficient - call that 208mpd from today. But that would take him to mid-December 2016, or a smidge under 2 years pretty much constant riding. I know Steve loves being on the bike, but, really?