Eek not the A1018 that looks hideous! No it was behind Kate Adie's in the estate to run parallel between Ryhope Rd and A1018 (Corporation Rd, Suffolk Rd ish) to approach bridge a bit straighter, not that I've looked in Streetview yet, debris on back roads is sometimes an issue and the 'mainer' Ryhope Rd is probably a much better bet.
Routing from Ryhope using Ryhope Rd then across bridge and around coast to Ferry is 15.6miles 140metres climb, and continuing on EV14 to tunnel makes it 21miles 190metres, the northwest passage up past Nissan is 20.5miles and 160metres, the latest suggestion Grotto - Cleadon Park looks to be 20.4mile and 190metres, the figures are from cycle.travel sorry about the mixed units.
So not a great deal of difference really, at 5miles and 50m (at the end of a ride it would matter!)
I guess the tunnel itself might add something extra but CT is so clever it might not!!
I do fancy the tunnels and understand I might struggle in a lift, or perhaps even have to shoulder the bike.
A mate of mine likes the Corporation Road route through Hendon, and it's certainly (another) valid alternative.
I'm no roadie, but I'm also not keen on too many stops and starts.
That route involves going through some blocked to vehicle turnings, meaning dismounts for kerbs and one with a couple of steps.
All doable, but I found it frustrating when I knew I could tootle up Ryhope Road with hardly a stop, given some luck with the couple of traffic lights.
Interesting you've found the three routes to be so close in elevation and distance.
I'm always going to like 'my' routes, but the others are just as good, particularly heading for the ferry then through Tyne Dock to the tunnel.
There's decent cycle paths for the last section, and it's probably simpler and easier than the northwest passage for a first timer.
Using the tunnel will mean another few miles on the other side to get to Tynemouth, and you will pass close to the ferry landing.
It's counter intuitive to me to pass the ferry on one side, do best part of 10 miles, only to pass the ferry on the other side.
Although as I said, taking my direct route might land you at your destination at 90-something miles, so you might be glad of the extra from using the tunnel, assuming hitting 100 is important.
If you use the tunnel, you could track north a bit earlier by using the wagonways - more smooth gravel - through the likes of Silverlink, Shiremoor, passing dangerously near Percy Main/Meadow Well - scene of some riots in the 90s.
You would be aiming for Earsdon, then pick up the B1325 out to the coast at Seaton Sluice, from where you are back on NCN 1 for Blyth (
@annedonnelly country) and points north.
The wagonway is NCN 10, so you should be able to find it on the map.
It runs beside a working goods railway for part of its length, so you might be able to race a train.
One thing against this route is the wagonway was gravity fed and the tiny gradient is against you, so you would have several miles of what I believe the roadies call 'false flat'.
It makes for a glorious ride in the other direction, but can feel hard work going the other way because you can never quite build up momentum.
If I'm doing a loop in enemy territory, I tend to go up the coast and down the wagonway.
Refreshment opportunities are few and far between on the wagonways, but you will pass a couple of convenience stores at the road crossings.
Look out for an old triple or possibly four seat tandem which is nailed to a gable end.
Plenty of behind a bush peeing opportunities on this route.
Standard security advice applies throughout this section of the ride.
A mate of mine had his bike nicked in 40 seconds outside a shop in Whitburn - it was timed on the shop's outside CCTV.
Another mate had his bike nicked in about a minute while having a pee in the toilets at the Fish Quay.
I'm sure your bike will be fine provided it's locked, even with a relatively light one.
Blyth is worth a mention for scran, several opportunities at South Beach, including a large Italian family run chip shop/cafe/ice cream parlour - simple food, but good.
There's usually an outside catering trailer as well, which is acceptable, and a small hot dog/ice cream stall closer to the seafront - next to the entrance to the public toilets.