Here’s this week’s round-up of the tech headlines from the last seven days

It’s been a week of extremes, with some interesting new tri bike designs announced ahead of the World Ironman Championships in Kona, as well as a rather lively retro steel bike and new, lighter Boris Bikes.

Radical new tri bikes

Three bike manufacturers have cocked a snook at the UCI’s bike design restrictions this week, by launching new triathlon-oriented time trial bikes ahead of the Ironman World Championships in Hawaii.

Cervélo P5X

Cervélo P5X. Forget about UCI approval.

BMC says its offering can be made UCI-legal by selecting one of two alternative seatpost positions and aerobar designs and it expects to use it at the World Championships in Doha. But Cube’s design would fail on seatstay position at least. And Cervélo’s P5X is so radical it’s not even worth asking for a UCI Approved sticker.

Or a limited edition steel bike

If retro is more your thing, then you may like Battaglin’s Special Collection Italian built steel frameset. The company is making a run of 65 of the frames to celebrate its founder Giovanni Battaglin’s 65th birthday. Battaglin was one of the 1980s’ top riders, winning both the Giro and the Vuelta in 1981.

Battaglin's limited edition steel frameset

Battaglin’s limited edition steel frameset

There’s something new for track riders too – provided they have deep pockets. The Felt bike ridden by the USA team at the Rio Olympics comes with a left-side drivetrain to improve its aerodynamics on the track and loads of other new tech. Yours for a mere $26,000.

With hill climb season in full swing, we’ve also looked at some of the lightest bikes out there, in action at the Monsal Hill Climb event last weekend.

And if you’ve ever piloted a Boris Bike around London, you’ll be pleased to know that there’s a new wave of lighter, more comfortable and more manoeuvrable machines on order from Pashley. Just don’t expect anything quite as light as the hill climb machines.

Autumn kit choices

With things turning decidedly chillier in the last week, it might be a good time to look for a new pair of bibtights. We’ve picked our favourites and given you a guide for what to look out for.

Watch: Buyer’s guide to bibtights

You might also want a dark weather jacket to go with that and Vulpine has just launched its stylish, reflective Nightfall version.

We’ve asked if you need a winter bike and told you about a Kickstarter campaign for synchronised flashing lights to fit to it. It might also be a good time to fit solid tyres to keep the winter grit from stopping you in your tracks. Specialized is now offering a hybrid bike with “airless” tyres.

Radar pace includes a microphone and earbuds as well as a touch sensitive control panel

Held accountable by your sunnies

And if you don’t feel enthusiastic about getting out this winter, you’ll be pleased to know that Oakley has launched talking sunglasses. Oakley says that Radar Pace “provides personalized and actionable instruction and holds athletes accountable to a structured and dynamic training program.”

Just what you need to keep you going – a pair of nagging sunnies.